Journal of the AU Dl0 ENGINEERING SOCIETY
This issue contains the papers presented at the Audio Fair held in conjunction with the Fourth Annual Convention of the Audio Engineering Society. in New York. October 29. 30. 31. and November 1. 1952 .
Binaural Disc Recording -- Enzory Cook ......
Methods of iC.leasuring Surface Induction of Magnetic Tape -- J . D . Bick ...... A New Professional Magnetic Recording Tape -Edward Schnzidt ...... Constant-Current Operation of Power Amplifiers-Howard T . Sterling and 'llan Sobel ...... A New Pocket Wire Recorder - Oliver Read ...... Musical Therapy .. R . L . Cardinell ...... Some Consideration Regarding Volume Production of Electronic Musical Instrun~ents- George H . Hadden . .
Gun-Shot Reinforcers and Synthesizers - J . L . Hathaway and R . E . Laferty ...... The Deposited-Carbon Resistor: An Essential Component of Good Audio Design Practice - LEewelEyn Bates Keim Electrolytic Capacitors. Why and When - Mark VanBuskirk ...... Choice of Electron Tubes for Audio Circuits - FV . R . Ayres ...... Review of New Printed Circuit Development and Audio-Frequency Applications - Arthur W . Kelly, Jr.... Intermodulation Measurements - H . H . Scott ...... Measurement of Nonlinear Distortion - Alan BEoch ...... Comparative Study of Methods for Measuring Nonlinear Distortion in Broadcasting Audio Facilities - Donald E . Maxwell ...... Distortion in Phonograph Reproduction - H . E . Roys ...... Basic Problems in Audio Systems Practice - W . E . Stewart ...... Audio-Frequency Input Circuits - William B . Snow ...... Attenuator Types and Their Application - Chester F . Scott ...... The Design of Speech Input Consoles for Television - Robert H . Tanner ...... Grounding, Shielding, and Isolation - Arthur Davis ...... Consideration of Some Factors Concerning the Use of Audio Transformers - W . E . Lehnert ...... Bypass and Decoupling Circuits in Audio Design -Lewis S . Goodfriend ...... Resistance-Capacitance Networks in Amplifier Design - E . D . Sissofz ...... Attenuation Equalizers - F . R . Bies ...... Network Transformations - L . Norde ...... Analyzing the Long-Playing Pickup Problem - Theodore Lindenberg ...... Binaural Sound Reproduction at Home - H . T . Sherman ...... Testing and Adjusting Speaker Installations with the Sound-Survey Meter -W . R . Thurston ...... Concert-Hall Realism through the Use of Dynamic Level Control - John Nigro and Jerry B . Minter .... Journal Authors ......
Journal of the Audio Engineering Society Volume 1. Number 1. January. 1953. Published quarterly by the Audio Engineering Society . P~~blication office 104 Liberty Street. Utica. N . Y . ~xec;tive and editorial ofice. Box 12. Old Chelsea Station. New York City 11. Application for entry as second- class'tnatter at the post oftice at Utica. N . Y . is pending . Subscription to non-members is $8 per year . Copyright 1953 by the -4udio Engineering Society . AUDIO ENGINEERING SOCIETY
OFFICERS FOR 1953 President F. SUMNERHALT,
Executiae Vice-President JERRY B. ~V~INTER
Central Vice-President Western Vice-P~esident Secretary W. S. PRITCHARU R. L. BURGESS C. J. LEBEL
GOVERNORS
COMMITTEE CHAIRMEN Admissions J. D. COLVIN
Awards Finance Publications H. F. OLSON R. 0. SUMMERLIN JERRY B. MINTER Constitution and By-Laws Public Relations V.J. LIEBLER WALTER0. STANTON
Convention Lecture Course Sections JERRYB. R~INTER C. J. LEBEL JAY H. QUINN Educational Standavds Standards R. H. ROSE JV. H. OFFENHAUSER,JR.
E~nploynzentRegister Test Reco1.d~ C. G. MCPROUD N. C. PICICERING
Sections Cincinnati Cleveland Columbus Los Angeles -1pplication blanks for membership New York may be obtained from the Secretary at San Francisco P. 0. Box 12. Old Chelsea Station, Southern Michigan Sew Yorli I I, Kew York.
Publications Editor: LEWISS. GOODFRIEND
The Journal of the Audio Engineering Society is publislhed quarterly and supplicd to all members of the Audio Engineering Society in good standing. Back numbers can be obtained from the Secretary at P. 0. Boa 12, Old Chelsea Station, New York 11, New York. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1953 President F. SUMNERHALL Some -4udio Considerations in Air Control Towers- Executive Vice-President JERRYB. MINTER Johrz C. Webster and Paul 0. Thompson .....171 Central Vice-President W. S. PRITCHARD History and Development of Stereophonic Sound Recording - Western Vice-President Ross H. Slzyder ...... 176 R. L. BURGESS
An <4dventure in Microphone Design - Howard T. Souther ..180
Secretary C. J. LEBEL Modern Methods of Filter Design - Leslie Xorde ...... 186
GOVERNORS The Vibrating String as an Audio-Frequency Circuit Element - Johpz 4. McWaid ...... 199
The Application of Printed Circuits and Miniaturized Assemblies to Audio Amplifiers and Equipment - Jesse Kanarek .... 202 COMMITTEE CHAIRMEN Admissions: J. D. COLVIN .4 Condenser Microphone for Quantitative Determinations of Awards: H. F. OLSON Ballistic Shock-Wave Intensities-W. G. Hornbostel and Constittction and By-Laws: V. J. LIEBLER Marcus C. Eliason 208 Conveation: JERRYB. MINTER ...... Educational Standards: R. H. ROSE Employment Register: C. G. MCPROUD A Low-ru'oise FM Recording System -- Walter T. Selsted ...213 Finance: W. 0. SUMMERLIN Historical: C. A. RACKEY Aircraft Public Address System Operation under High-Level Ambient Lecture Course: JAYH. QUINN Noise Conditions - Jackson C. Baker ...... 2 16 Membership: W. H. HAZLETT Nominations: C. R. SAWYER Publications : JERRYB. MINTER Journal Authors ...... 221 Public Relations : WAI:~ER0. STANTON Sections: C. J. LEBEL Section Meetings ...... 223 Standards: W. H. OFFENHAUSER,JR. Test Records: N. C. PICKERING Editor: LEWISS. GOODFRIEND Sections Associate Editor: VINCENTSALMON Cincinnati New York The Journal of the Audio Engineering Society is published quarterly and supplied to Cleveland San Francisco all members of the Audio Engineering Society in good standing. Application blanks Columbus Southern Michigan for membership and back numbers of the Journal may be obtained from the Secretary, Los Angeles P. 0. Box 12, Old Chelsea Station, New York 11, New York.
Journal of the Audio Engineering Society, Volume 1, Kumber 2, April, 1953, Published quarterly by the Audio Engineering Society. Publication office 104 Liberty Street, Ctica? N. Y. Executive and editorial office, Box 12, Old Chelsea Station, New York City 11. Entered as second-class mattir at the post office at Ut~ca,N. Y. Subscript~onto non-members is $8 per year. Copyright 1953 by the Audio Engineering Society. Journal of the AU Dl0 ENGINEERING SOCIETY
OFFICERS FOR 1953 President F. SUMNERHALL Executive Vice-President Structure and Performance of Magnetic Transducer Heads - JERRYB. MINTER Otto Kornei ...... 225 Central Vice-President W. S. PRITCHARD Western Vice-President 232 HARRYBRYANT* New High-Grade Condenser Microphones - F. W. 0.Bauch . Treasurer RALPHA. SCHLEGEL Secretary A Variable-Speed Distributor System for Synchronizing Out-of-Sync C. J. LEBEL Pictures and Sound Tracks - H. Af. l'remaine ...241
GOVERNORS A Novel Audio Sweep Generator - Peter Pohl and Henry Wolcott . 244
The Amplifier and Its Place in the High-Fidelity System - COMMITTEE CHAIRMEN j( 8. H. Scott ...... 246 Admissions: J. D. COLVIN Awards: H. F. OLSON Constitution and By-Laws: V. J. LIEBLER Two Ears in Three Dimensions - Norman C. I'ickering and Convetttion: JERRYB. MINTER Eric Baender, M.D...... 255 Cooperative Researrh: PRICEE. FISH Educational Standards: R. H. ROSE Employment Register: C. G'. MCPROUD - Finance: W. 0. SUMMERLIN A Variable Inductor R. E. Allison ....262 Historical: C. A. RACKEY Lecture Course: JAYH. QUINN Membership: W. H. HAZLETT Review of New Materials and Techniques in High-Fidelity Trans- Nominations: C. R. SAWYER former Design-Le,wis W. Howard ...... 265 Papers Procurement: W. R. DRESSER Publications: JERRYB. MINTER Public Relations: WALTER0. STANTON Journal Authors ...... 269 Sections: C. J. LEBEL Standards: W. H. OFFENHAUSER,JR. Test Records: N. C. PICKERING Section Meetings ...... 2 71 Sections Cincinnati New York Cleveland San Francisco Columbus Southern Michigan Editor: LEWISS. GOODFRIEND Los Angeles Associate Editor: VINCENTSALMON British Lioison British Sound Recording Association The Journal of the Audio Engineering Society is published quarterly and supplied to London W. C. 1, England all members of the Audio Engineering Society in good standing. Application blanks * Inieri~nappoint~nent to replace K. L. Burgess, for membership and back numbers of the Journal may be obtained from the Secretary, decc;~sed. P. 0. Box 12, Old Chelsea Station, New York 11, New York.
Journal of the .\udio Enginrering Society Volume 1, Number 3 July, 1953, Published quarterly by the Audio Engineering Society. Publication ofice, 104 Liberty Street, I'tlcn. W. Y. ~xe&tive and editorial offick, Box 12, Old Chelsea Station, New York 11 N. Y. Entered 3s second-class matter at the post ofice at Vtica, N. Y. Subscription to non-members is $8 per year. Copyright 195j by the Audio Engineering Society. Journal of the AUDIO ENGINEERING SOCIETY E S
OFFICERS FOR 1953 President F; SUMNERHALL Executive Vice-President JERRYB. MINTER Design of an Electrostatic Loudspeaker - Theodore Lindenberg, Charles E. Smiley, and Jeny B. Minte~ Certral.Vice-President .....273 W.S. PRITCHARD Design Factors in Horn-Type Speakers - Danicl J. Plach . . , . , 276 Western Vice-President HARRYBRYANT* .4 New Transformerless Amplifier Circuit - Kcrim Onder ...282
A Stereodynamic Multichannel Amplifier for Single or Binaural Secretary Input - John A7igro C. J. LEBEL ...... 287
GOVERNORS A New 30-Watt Power Amplifier - Sidney A. Corder~nafzand JOHN D. COLVIN JAYH. QUINN Frank H. A!lcIlztosh ...... 292 PRICEE. FISH C. R. SAWYER ' C. G. MCPROUD W. 0. SUMMERLIN Audio and Interior Decor - Jefl Markell adMary Leighton .... 297 ALBERTA. PULLEY Decorating the Home with Music - Russell J. Tifzkham . 302 COMMITTEE CIIAIRMENf A Composite Recording System for Studio or High-Fidelity Admissions: J. D. COLVIN 1 Applications - 0livt.r Rcad ...... 305 Awards: H. F. OLSON Co~stitzrtiogz and By-Laws: V. J. LIEULER Audio Automatic Volume Control Systems - F. W. Roberts ad Cosventiotz: JERRYB. MINTER R. C. Cz~rtis...... 310 Cooperative Research: PRICEE. FISII Educational Staszdards: R. H. ROSE A IKew Eusiness Office Dictating Machine Csing Magnetic Tape as Employment Register: C. G. MCPROUD Recording Medium -- Sainuel J. Hynzan ...... 3 17 Finance: W. 0. SUMMERLIN Histotical: C. A. RACKEY Eflect of High-Frequency Pre-Emphasis on Groove Shape - Lecture Course: JAYH. QUINN Jerry B. Milzti'r and ,4ldo R. dIiccioli ....321 - Membership: W. H. HAZLETT Nominations: C. R. SAWYER AES Sews...... 327 Papers Proczirement: W. R. DRESSER Publicafions: JERRYR. MINTER Journal Authors ...... 33 1 Public Relations: WALTER0. STANTON Srctions: C. J. LEBEL '4ES C'onvention Program ...... 333 S:-cmdards: W. H. OFFENHAUSER,JR. Test Records: N. C. PICKERIKG Contents of 1;olume 1 ...... 339 1 Sections Author Index ...... 34 Cincinnati New York Cleveland San Francisco Columbus Southern Michigan Los Angeles British Linisou British Sound Recording Association The Journal of the Audio Engineering Society is published quarterly and supplied to London W. C. 1, England all members of the Audio Entineering Society in good standing. Application blanks ' 1nteri.n appointment to replace R. L. Burgess, for membership and back numbers of the Journal may be obtained from the Secretary, deceased. P. 0. Kou 12, Old Chelsea Station, New York 11, New York.
-- -- Journal of tl!e :\~~dioEngineering Society, \-c11v.m~1, K~~rnl~cr4, Oc~olxr, 195.3. Pul~li~llecl
Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1954 President JERRYB. MINTER Executive Vice-President New Advances in Language Teaching - The Georgetown University A. A. PULLEY Project - Morris Lewis Groder ...... 65 Central Vice-President R. C. MOYER Western Vice-President An Analytical Approach to Phonograph Pickup Design - BOYDMCKNIGHT Walter 0. Stanton ...... 71 Treasurer RALPHA. SCITLEGEL Secretary Amplifiers and Superlatives -- D. T. N. Williamson and P. J. Walker 75 C. J. LEBEL
Design of a Preamplifier for Low-Level Inputs - GOVERNORS &fartin V. Kiebert, Jv...... 81 PRICEE. FISII RICHARDH. RANGER F. SUMNERHALL C. R. SAWYER JAYH. QUINN LAURENCEJ. SCULLY -4 Kew Program Distribution System - W. 0. STANTON - Stephen F. Tenzmer and Rein Saruza ...88 COhlMITTEE CHAIRMEN Admissions: PRICEE. FISH Bibliography of Disk Recording ...... 92 A wards: F. SUMNERHALL Constitution and By-Laws: V. J. LIEBLER Convention: A. A. PULLEY Edwin Howard Armstrong - 1890-1954 .....109 Cooperative Research: HUGHKNOWLES Educational Standards: R. H. ROSE Employment Register: C. G. MCPROUD Book Review ...... 1 10 Finance: C. R. SAWYER Historical: C. A. RACKEY Letters ...... 11 1 Lecture Course: JULIUSPOSTAL Membership: OLIVERREAD Nominations: LAURENCESCULLY AESNews ...... 112 Papers Procurement: AVERYLOCKNER Publications: RICHARDH. RANGER Pzcblic Relations: WALTER0. STANTON -4~1dioAspects of the SilIPTE 74th Convention - A Review - Sections: C. J. LEBEL Julius Postal ...... 11 9 Standards: W. H. OFFENHAUSER,JR.
Sections Journal Authors ...... 142 Cincinnati New York - Cleveland San Francisco Columbus Southern Michigan Editor: LEWISS. GOODFRIEND Los Angeles Rensselaer Polytechnic Associate Editors: GEORGEE. GYNN, JULIUSPOSTAL, VINCENT SALMON Institute (student) Assistant Editors: ELIZABETHH. BEAUMONT,DOROTHEA S. THORBURN The Journal of the Audio Engineering Society is published quarterly and supplied to British Liaison all members of the Audio Engineering Society in good standing. Application blanks British Sound Recording Association for membership and back numbers of the Journal may be obtained from the Secretary, London W. C. 1, England P. 0. Box 12, Old Chelsea Station, New York 11, New York.
Journal of the Audio Engineering Society, Volume 2, Kumher 2, April 1954. Published quarterly by the Audio Engineering Society. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New Yorli 11, N. Y. Entered as second-class matter at the post office at Utica, N. Y. Subscription to nonmembers is $3 per year. Copyright 1954 by the Audio Engineering Society. Journal of the AU DIO ENGINEERING SOCIETY
-- OFFICERS FOR 1954 President JERRYB. MINTER Executive Vice-President A. A. PULLEY Survey of Flux-Responsive Magnetic Reproducing Heads - Otto Kornei 145 Central Vice-President R. C. MOYER Western Vice-President BOYDMCKNIGHT Resonance, Tracking, and Distortion - An Analysis of Phonograph Treasurer RALPHA. SCI~LEGEL Pickup Arms - R. E. Ca~lso?z ...... 151 Secretary C. J. LEBEL
The Fundamentals of Disk Reproduction - S. Kelly ....163 GOVERNORS PRICEE. FISH RICHARDH. RANGER F. SUMNERHALL C. R. S~WYER JAY H. QUINN LAURENCEJ. SCULLY Etched Circuits for Audio - B. 171 W. 0. STANTON Icenyon Howa~d .
COMMITTEE CHAIRMEN Admissions: PRICEE. FISH Awards: F. SUMNERHALL The Mechanics of Good Loudspealier Design -Abraham B. Cohen . 176 Constitzttion and By-Laws: V. J. LIEBLER Convention: A. A. PULLEY Cooperative Research: HUGIIKNOWLES Educational Standards: R. H. ROSE Bibliographyof MagneticRecording--Alfred Jorysz ...183 Employment Register: C. G. MCPROUD Finance: C. R. SAWYER Historical: C. A. RACKEY Lecture Course: JULIUSPOSTAL il4embership: OLIVERREAD Nomitzations : LAURENCESCULLY Papers Procurement: AVERYLOCKNER Pzcblications: RICHARDH. RANGER Pztblic Relations: WALTER0. STANTON Journal Authors ...... 201 Sections: C. J. LEBEL Standards: W. H. OFFENHAUSER,JR.
Sections Cincinnati New York Editor: LEWISS. GOODFRIEND Cleveland San Francisco Associate Editors: GEORGEE. GYNN, JULIUSPOSTAI,, VINCENT SALMON Columbus Southern Michigan Assistant Editors: DOROTHEAS. THORBUI~N,ELIZABETH H. BEAUMONT Los Angeles Rensselaer Polytechnic Institute (student) The Journal of the Audio Engineering Society is published quarterly and supplied to all members of the Audio Engineering Society in good standing. Application blanks for membership and back numbers of the Journal may be obtained from the Secretary, British Liaison P. 0.Box 12, Old Chelsea Station, New York 11, New York. British Sound Recording Association London W. C. 1, England
Journal of the Audio Engineering Society, Volume 2, Number 3, July 1954. Published quarterly by the Audio Engineering Society. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station. Xew Yorlc 11, N. Y. Entered as second-class matter at the post office at Utica, N. Y. Subscription to nonmembers is $8 per year. Copyright 1954 by the Audio Engineering Society. Journal of the AUDIO ENGINEERING SOCIETY
OFFICERS FOR 1954 President JERRYB. MINTER hlotion Picture Sound Recording at USAF Lookout Mountain Executive Vice-President Laboratory - El. M. Trenzaifze .....204 A. A. PULLEY Central Vice-Presidetat An Experimental Study of Distortion - C. J. LeBd ...... 215 R. C. MO~ER Western Vice-President Recent Developments in Direct-Radiator High-Fidelity Loudspeakers BOYDMCKNIGHT --Harry F. Olson, John Preston, and Everett G. &fay ... 219 Treasurer RAI.PI~A. SCIILECEL A Moving-Coil Feedhacli Disk Recorder - C. C. Davis . 228 Secretary C. J. LEBEL A Stable Laboratory Standard Condenser Microphone - J. F. Houdek, Jr...... 234
GOVERNORS A Twin-Lever Ceramic Cartridge PRICEE. FISH RICHARDH. RANGER - B. H.Bnzcer, L. Gzmter, and E. Seeler 239 F. SUMNERHALL C. R. SAWYER JAYH. QUINN LAURENCEJ. SCULI.Y hfultidirectional Reproduction and Re-recording of Music from a -- D. W. 0. STANTON Single Sound Source Charles Lifzdridge .....244 Monogroove Stereophonic Disk Recording - Johfz T. Mullin ... 249 COMMITTEE CHAIRMEN Admissions: PRICEE. FISII An Output-Transformerless Power Amplifier - Julius Futternzan . . 252 Awards: F. SUMNERHALL Constitzctio+ and By-Laws: V. J. LIEULER Characteristics of Bass Elnphasis Circuits - Charles D. Lindrid,ge . . 257 Convention: A. A. PULLEY An External Automatic Sweep Generator for Use with Cathode-Ray Cooperative Reseat ch: HIJGII KNOWLES Oscilloscopes - Ala~zRloch ...... 2 59 Edzccational Standards: R. 13. ROSE Employment Register: C. G. MCPROUD Harold T. Sherman - 1904-1954 ...... 262 Finance: C. It. SAWYER Histotical: C. A. RACKEY AES News ...... 263 Lcctztre Cozcrse: JUI-[usPOSIAL Jfembersizip: OLIVERREAD Journal Authors ...... 265 Nogninntions: LAURENCESCULLY Papers P~oczlrement: Avsrw LOCKNER Contents of Volume 2 ...... 267 Publications: RICI-IARDH. RANGER Author Index, Volume 2 ...... 268 Public Relations: WAI~ITR0. S.~ANTON Sections: C. .I. LEBEL Membership Applicatio~lBlank ...... 269 Standards: W. H. OFPENIIAUSER,JR.
Sections CItairman of the Publications Conzmittee: RICHARDH. RANGER Cincinnati San Francisco Editor: VINCENTSAI.MON Managing Editor: JULIUSPOSTAL Cleveland Southern Michigan Columbus Rensselaer Polytechnic Associate Editor: GEORGEE. GYNN Los .4ngeles Institute (student) Copy Editor: DOROTIIEAS. THOREURN News Editor: ELIZABETITH. BEAUMONT New York Japan The Journal of the Audio Engineering Society is published quarterly and supplied to British Liaison all members of the Audio Engineering Society in good standing. Application blanks British Sound Recording Association for membership and back numbers of the Journal may be obtained from the Secretary, London W. C. 1, England P. 0.Box 12, Old Chelsea Station, New York 11, New York.
- - ~p Journal oi tlle .ludio Engineering Socicty, Yolurue 2, Xuml~er4, October 1954. Pilhlished quarterly b3- the Audio Engineering Society. PublicatLon office, 104 I.;berty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. 1'. Entered as second-class matter at the post office at Utica, N. Y. Subscription to no~lmembers is $8 per year. Copyright 1955 by tile Audio Engineering Society.
Journal of the
- AUDIO ENGINEERING SOCIETY
OFFICERS FOR 1955 President A. A. PULLEY Record Stylus Pressure -- -4. ili. Max ...... 66 Executive Vice-President RICHARDH. RANGER I'resent-Day Developments in Magnetic I'ickups - Walter 0. Stanton 70 Central Vice-President I W. J. MAHONEY Frequency Characteristics of a Sound-Reinforcing System - Willia~rzB. Snow ...... 74 Western Vice-President RICHARDF. HASTINGS A Microphone for Informal Use - L. M. Bigington and R. M. Carrel1 77 Treasurer I RALPHA. SCHLEGEL An Extended Cathode-Coupled Phase Inverter and Its Application to Single-Ended I'ush-Pull Amplifiers - Hiroshi Anzemiya . . 82 Secretary C. J. LEBEL An Electrostatic 1,oudspealrer Development - Arthur A. lanszen . . 87 Past President 1 JERRYB. MINTER I Develop~i~entof a Subminiature Tape Recorder - Albert C. Travis, Jr. 91 MIL-T-27 Procurement Problems - Eugene L. Eiaikin ..... 97 GOVERNORS A Method for the Quantitative RIeasurement of Wind-Noise Sensitivity in Microphones - R. ill. Carrel1 .....102 Decibel Tables; Power and Voltage Ratios ...... 106 AES News ...... 110 Journal Authors ...... 11 8 COMMITTEE CHAIRMEN Membership Application Blank ...... 119 Admissions: ERNESTW. FRANCK Awards: SHERMANM. FAIRCHILD Constitution and By-Laws: V. J. LIEBLER Convention: RICI~ARDH. RANGER PUBLICATIONS COMMITTEE Employment Register: E. V.B. KETTLEMAN Finance: LAWRENCEJ. SCULLY CARLETONR. SAWYER,Clzairman A. A. PULLEY Historical: CHESTERA. RACKEY F. SCTMNERHALL RICHARDH. RANGER Lecture Course: JULIUSPOSTAL GEORGEHORIUCHI VINCENTSALMON Nominations: JERRYB. MINTER JULIUSPOSTAL WALTER0. STANTON Papers Procurement: CLAIRD. KREPPS Publications: CARLETONR. SAWYER Public Relations: EMORYG. COOK STAFF Sections: C. J. LEEEL Editor: VIKCENTSALMON Managing Editor: JELIUSPOSTAL Standards: FREDERICKW. ROBERTS Associate Editor: GEORGEE. GYNN Prodztction Editov: N~OMIPOSTAL
Sections News Erlitov: ELIZA~ETHH. BEAU~IONT Cincinnati San Francisco Columbus Rensselaer Polytechnic Los Angeles Institute (student) New York Japan Applicaticn blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, P. 0. Box 12, Old Chelsea Station, Britislz Liaison New York 11, New York. British Sound Recording Association London W. C. 1, England 1
Journal of the Audio Et~gineering Society, Volume 3, Kumbcr 2, April 1955. Publi41ed quarterly by tlie Audio Engineering Society and supplied to all members in good standing. Publicatio~ioftice, 104 Liberty Street, Utica, X, Y. Executive and cditorial office, P. 0. Box 12, Old Chelsea Station. New York 11, N. Y. Enterecl as second-class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Address manuscripts to the Managing. Editor. Copyright 1955 by the Audio Engineering Society. Journal of the s AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1955 JULY 1955 VOLUME3, NUMBER3 President A. A. PULLEY
Executive Vice-President Transient Behavior of Electric Wave Filters --Leslie Norde . RrcaARD H. RANGER Central Vice-President W. J. MAHONEY I Power Amplifiers for l\lusic Reproduction - Herlnon H. Scott . , . 132 Western Vice-President RICHARDF. HASTINGS Locating Defects in Magnetic Recording Tape -Andreas ICramer . . 143 Treaszcrer RALPHA. SCHLEGEL The Appreciation of Tone Quality -- Charles D. Lindridge .... 147 Secretary C. J. LEBEL Past President Measurement of Flutter and Wow in Magnetic-Tape Instrumentation JERRYB. MINTER Recorders - John T. illullin ...... 151
GOVERNORS High-Efficiency Three-way Speaker System - Saztl J. White ... 155
Practical Tape Duplication - Ross H. Snyder ...... 16Q
AES News ...... 1651
COMMITTEE CHAIRMEN I Journal Authors ...... Admissio+zs: ERNESTW. FRANCK A wards: SHERMANM. FAIRCH~LD Constitution and By-Laws: V.J. LIEBLER Convention: RICHARDH. RANGER Employment Register: E. V.B. KETTLEMAN PUBLICATIONS COMMITTEE Finance: LAWRENCEJ. SCULLY Historical: CHESTERA. RACKEY CARLETONR. SAWYER,Chairman Lecture Course: JULIUSPOST~L F. SUMNERHALL A. A. PULLEY Nominations: JERRYB. MINTER GEORGEHORIUCHI RICFI~RI)H. RANGER Papers Procurement: CLAIRD. KREPPS W. H. OFFENHACSER,JR. VINCENTSALMON Pzzblications: CARLETONR. SAWYER JULIUSPOSTAL WALTER0. STANTON Public Relations: EMORYG. COOK Sections: C. J. LEBEL STAFF Standards: FREDERICKW. ROBERTS Editor: VINCENTSALMON Managing Editor: JULIUSPOSTAL
Sections Prodzcction Editor: NAOMIPOSTAL Cincinnati San Francisco Columbus Rensselaer Polvtechnic Los Angeles Institute (&dent) New York Japan Application blanks for membership in the Audio Engineering Society and hack numbers I of the JOURNALmay be obtained from the Secretary, P. 0.Box 12, Old Chelsea Station, New York 11, New York. Britislz Liaison I British Sound Recording Association London W. C. 1, England I - - Journal of the Audio Engineering Society, Volume 3, Number 3, July 1955. Published quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication oftice, 104 Liberty Street, Utica, K. Y. Executire and editorial office, P. 0. Box 12, Old Chelsea Station, New Yorlc 11, N. Y. Entered as second-class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Address manuscripts and all editorial correspondel?ce to the Managing Editor-Julius Postal, P.O. Box 49, Bowling Green Station, New I'ork 4, N. Y. Coyyrigl~t 19% by the Audio Engineering Society. Journal of the AU DlO ENGINEERING SOCIETY E s
OFFICERS FOR 1955-56 Presideat RICHARDH. RAKGER Fundamentals of Speech Synthesis- Horner Dudley . . . . . Executive Vice-President WALTER0. STANTON Magnetic Properties of Recording-Tape Pigments - J. Gittlernan . Central Vice-President Standards of Acceptability for High-Fidelity Loudspeakers EWINGD. NLNN - P. D. Collings-Wells . . . . , . . . . , . . Western Vice-President ROY A. LONG On Electrical Loading of Microphones -Richard E. Werner . . . Treasurer RALPHA. SCHLEGEL Secretary Magnetic Pickups and Proper Playback Equalization C. J. LEBEL - Walter 0. Staxton ...... , , . , Past President -4 Co-ordinated Church Audio-Visual System - Clyde R. Keith A. A. PULLEY Some Design Criteria for Magnetic Tape - Robert .4. von Behren GOVERNORS Seventh Annual Convention of the AES - Preliminary Report Highlights ...... Program of Technical Sessions ...... Exhibitors at Audiorama 1955, New York . . . . .
Membership Information . , . . . . . , . . . . . , Journal Authors - A. I. Aronson, P. D. Callings-Wells, Homer I.V. Dudley, J. Gittleman, Clyde R. Keith, Walter 0.Stanton, COAMMITTEECHAIRMEN Robert A. von Behren, Saul J. White . . . , , . Admissiovis: ERNESTW. FRANCK Awards: JOHKD. COLVIN Annual Index for Volume 3 ( 1955). JOURNALOF THE ,4ES . , , Constitution a+td By-Laws: V. J. LIEBLER blembership Application Blank ...... Convention: W~LTER0. STANTON Employmelrt Register: E. V.B. KETTLEMAN Finance: VICIORBROCINER Historical: CHESTERA. RACKEY PUBLICATIONS COhIMITTEE Membership: C. ROBERTPAULSON Nominations: A. A. PULLEY CARLETONR. SAWYER,Chairman JULIUSPOSTAL Papers Puocurcment: DON~LDJ. PLUNKETT F. SU~ISERHALL A. A. PULLEY Publications: CARLETONR. SAWYER GEORGEHORIUCHI RICHARDH. RANGER Public Reh!i~lt~:sH~Rhl4iX M. FAIRCHILD W. H. OFFENH~USER,JR. WALTER0. STANTON Staizdards: C. ROBERTFINE
Sections Editor: JULIUSPOSTAL Production Editor: NAOMIPOSTAL Cincinnati San Francisco Columbus Rensselaer Polytechnic Los Angeles Institute (student) New York Japan Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, P. 0. Box 12, Old Chelsea Station, British Liaison New York 11, New York. British Sound Recording Association London W. C. 1, England 1
Journal oi the Audio E~lgineeringSociety, Volume 3, Number 4, October 1955. Published quarterly by the Audio Engineering Society and supplied to all members In good standing. Publication office, 104 Liberty Street, Utica, K. IT.Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Kew York 11, Ii. Y. Entered as second-class matter at the post office at Utica, S. 1'. Subscription to nonmembers, $8 per year. Address manuscripts .and all editorial correspondence to the Editor-Julius Postal, P.O. Box 49, Bowling Green Station, Iiew York 4, K. Y. Copyright 1956 by the Audio Engineering Society.
Journal of the AU DIO ENGINEERING SOCl ETY
OFFICERS FOR 1955-56 Presidettt RICHARDH. RANGER Executive Vice-President WALTER0. STANTON I Ce~tralVice-President Recent Developments in Precision Master Recording Lathes - EWINGD. NUNN I Jerry B. ildinte~ , . , , , ...... 50 Western Vice-President ROY A. LONG The Isophase Loudspealrer-Theodore Lindefzberg ...... 56
Secretary Transistor Audio Power-Output Stages- J. Ma~shallajzd D. Moge~z . 60 C. J. LEBEL Past President A. A. PULLEY Audio Console Design Sotes - Philip C. Erhorn . . , . . . .
GOVERNORS An Output-Transformerless Amplifier-Hi~oshi Anzcfniya , . , . , 72 VICTOREROCINER Locked Concentric-Grooved Disc for Use in Measurements of Disc- Reproducer Performance- Jack Fei~zstehz . . . . . , . 76
Quality Control of Loudspeakers as It Affects Consumers - E. V. Reiss 82 COMMITTEE CHAIRMEN A dtnissio+as: ERNESTW. FRANCK ilIeinbership Application Elank ...... -87 A wavds: JOHND. COLVIN Constitution and By-Laws: V.J. LIEBLER Cotivention: WALTER0. STANTON Employmetat Register: E. V. B. KETTLE~~~N Finance: \'ICTOR BROCINER Historical: CHESTERA. RACKEY i'ilenzbership: C. ROBERTPAULSON Nonzinations: A. A. PULLEY CARLETONR. SAWYER,Chairmatz CLYDER. KEITH Pafiers Procu;.,-:rant: DOKALDJ. PLUNKETT W. H. OFFENHAUSER,JR., Vice-Chairman JULIUSPOSTAL Publications: CARLETONR. SAWYER F. SUMNERHALL A. A. PULLEY Public Relations: SHERMANM. FAIRCHILD GEORGEHORIUCHI RICHARDH. RANGER Statidards: C. ROBERTFINE
Sections Edito~:JULIUS POSTAL Pvoductiolt Editor: NAOMIPOSTAL Cincinnati New York Columbus San Francisco Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Los Angeles Japan Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Liaiso+z I Eritish Sound Recordins Association London W. C. 1, England 1 >-
Journal oi the Audio Engineering Society, Volunle 4, Number 2, April 1956, Published cjuar:erly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executi~eacd editorial office, P. 0. BOX 12, Old Chelsea Staten, New York 11, N. Y. Entered as second-class matter at the post office at Utica, N. Y. Subscription to nonmembers, $E per year. Address manuscripts and all editorial corresponcletlce to the Editor-Julius Postal, P.O. Box 49, Bowling Green Stallon, New York 4, N. Y. Copyright 1956 by the Audio Engineering Society. Journal of the
AUDIO ENGINEERING SOCIETY E s
OFFICERS FOR 1955-56 President RICHARDH. RANGER Executive Vice-president WALTER0. STANTON New Products and New Applications in the Magnetic-Tape and Film Fields - Ernest W. Franck and Edward Schmidt . . . 90 Central Vice-President EWINGD. NUNN Western Vice-President ROYA. LONG The Radical Tone Arm - An Unconventional Phonograph Pickup Suspension - Roys and Masterson 101 Treasurer H. E. E. E...... ~LPUA. SCHLEGEL Secretarv C. J. LEBEI, Tweeter Design Considerations-George W. Sioles ...... 105 Past President A. A. PULLEY Free-Field Technique for Secondary Standard Calibration of GOVERNORS Microphones--Arnold L. SeEigson . . . . .
Comments on the Paper, "On Stylus Wear and Surface Noise in Phonograph Playback System"-D. A. Barlow . . . . 116
Book Reviews ...... 120 COMMITTEE CHAIRMEN Admissions: ERXESTW. FRANCK Awards: JOHND. COLVIN Constitution and Bv-Laws: V. J. LIEBLER Membership Information; New Members and Changes of Grade . . 122 Convention: WALTER0. STANTON Employment Redster: E. V.B. KETTLEMAN Finance: VICTORBROCINER Highlights of the AES Year; a Photographic Roundup - Julius Postal 124 Historical: CHESTERA. RACREY Membership: C. ROBERTPAULSON Nominations: A. A. PULLEY PUBLICATIONS COMMITTEE Papers Procurement: DONALDJ. PLUNKETT Publications: CARLETONR. SAWYER CARLETONR. SAWYER,Chairman CLYDER. KEITH Public Relations: SHERMANM. FAIRCHILD W. H. OFPENHAUSER,JR., Vice-Chairman JULIUSPOSTAL Standards: C. ROBERTFINE F. SUMNERHALL A. A. PULLEY GEORGEHORIUCHI RICHARDH. RANGER Sections Cincinnati New York Columbus San Francisco Editor: JULIUSPOSTAL Production Editor: NAOMIPOSTAL Indiana Technical Rensselaer Polvtechnic College (student) Institute (student) Los Angeles Japan Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Liaison British Sound Recording Association London W. C. 1, England
-- - Journal of the Audio Engineering Society, VI~lume 4, Kumber 3, July 1956. Published quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, If. Y. Entered as second-class nlatter at the post office at Utica, N. Y. Subscript~onto nonmembers. $8 per year. Address manuscripts and all editorial corres~ondenceto the Editor-] -ulius Postal, P.O. Box 49, Bowling Green Station, New York 4, N. Y. Copyright 1957, by the Audio Engineering Society. Journal of the AU DIO ENGINEERING SOCIETY E s
- OFFICERS FOR 1955-56 President RICHARDH. RANGER Executive Vice-President WALTER0. STANTON - P. Central Vice-President Development of a New Flight-Deck Loudspeaker J. Densherger 138 EWINGD. NUNN Western Vice-President Some Thoughts on Evaluating Audio Components for the Consumer ROY A. LONG - JuEian Ll. Hirsch and Milton Weiss ...... 145 Treasurer RALPHA. SCHLEGEL Audio in Salmon Research - Richard H. VanHaagen ...... 151 Secretarv C. J. LEBEL Pasf President The Control of Quality in Phonograph Records- Edward H. Uecke 159 A. A. PULLEY
A Practical Commercial Output-Transformerless Amplifier GOVERNORS - Julius Futternzan ...... 163
Transistor Input Stage for Phonograph Pickups - H. C. Lin ...168
A Professional Approach to Home-Recording Systems -Philip C. Erhorn ...... 176 COMMITTEE CHAIRMEN Admissions: ERNESTW. FRANCK Transistorized Microphone Preamplifier and Remote Broadcast Awards: JOHND. COLVIN Mixer-Amplifier - William D. Bevitt ...... 181 Constitution and By-Laws: V. J. LIEBLER Convention: WALTER0. STANTON Employmeat Register: E. V. B. KETTLEMAN Finance: VICTORBROCINER Theory of the Bridge Amplifier-John van Heijenoort ..... 185 Historical: CHESTERA. RACKEY Membership: C. ROBERTPAULSON Nominations: A. A. PULLEY PUBLICATIONS COMMITTEE Papers Procurement: DONALDJ. PLUNKETT Publications: CARLETONR. SAWYER CARLETONR. SAWYER,Chairman CLYDER. KEITH Public Relations: SHERMANM. FAIRCHILD W. H. OFPENHAUSER,JR., Vice-Chairman JULIUSPOSTAL Standards: C. ROBERTFINE F. SUMNERHALL A. A. PULLEY GEORGEHORIUCHI RICHARDH. RANGER Sections Cincinnati New York Columbus San Francisco Editor: JULIUSPOSTAL Production Editor: NAOMIPOSTAL Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Los Angeles Japan Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, P. 0.Box 12, Old Chelsea Station, New York 11, New York. British Liaison British Sound Recording Association London W. C. 1, England
Journal of the .4utlio Engineering Society, \'olume 4, Xumbcr 4, Octoher 1956. Puhlisl~edquarterly by tlie Audio Engineering Society and supplied to memtlers in good standing. Fublication ofice, 104 1,iberty Street, Utica, S. Y., Executi~eand editorial office, P. 0. Box 12, Old Chelsea Station, yew York 11, N. IT.Entered as secoiid-class matter at the post office at Yiica, N. \I. Subscriptions to tlonmembers, $6 per year. Hereafter address nlalluscripts and all editorial correspondence to George Horiuchi, Colun~biaUniversity, 632 iVest 125th Street, New York 27, N. Y. Copyright 1957, hy the Audio Engineering Society.
Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1956-57 President WALTER0. STANTON Impedance-Matched or Optimum?-William B. Snow ..... 66 Executive Vice-President SHERMANM. FAIRCHILD Innovations in Studio Design and Construction in the Capitol Tower Central Vice-President HENRYJ. SCHROEDER Recording Studios-James W. Bayless ...... 71 Western Vice-President Ross H. SNYDER The Bias Characteristics of Tape Recorders-Frank Radocy and Andreas Kramer 76 Treasurer ...... RALPHA. SCHLEGEL Secretary The Application of Velocity Microphones to Stereophonic Recording C. J. LEBEL -E. R. Madsen ...... 79 Past President RICHARDH. RANGER An In-Line Two-Channel Magnetic Head of Universal Application -Richard Sinott and iWe1vin Sprinkle ...... 86 BOARD OF GOVERNORS Practical Aspects of Hot Stylus-Carlos E. R. de A. Moz~va ...90
Tape Recorder Flutter: Causes and Effects-Earle F. Travis and Lawvence L. La Zelle ...... 94
Solution to Some Problems in Making Master Tapes-R. J. Tinkham 99
COMMITTEE CHAIRMEN Evaluation of Tape Recorders--C. E. Parker ...... 104 Admissions: E. 1'. B. KETTLEMAN Note on Reverberation Chambers-Michael Rettinger 10.8 Awards: ERNESTW. FRANCK ...... Convention: SHERMANM. FAIRCHILD Employment Register: E. V.B. KETTLEMAN Limiting Factors in Gramophone Reproduction-D. A. Barlow ... 109 Finance: VICTORBROCINER ...... Historical: C. A. RACKEY Book Reviews 1 18 Laws and Resolutions: VINCENTJ. L~EBLER Date of Publication: June 10, 1958 Lecture Course: W. H. OFFENHAUSER,JR. Membership: C. ROBERTPAUI.SON Since the statements and opinions which appear in the papers published in this Nominations: RICHARD RANGER Journal are expressions of their respective authors, the Society can assume no H. responsibility for them. Where, however, there exists controversy or disagree- Papers Procurement: CARLE. WARNER ment, the Editor invites correspondence. Publications: DONALDJ. PLUNKETT Public Relations: WILLIAMA. SAVORY Sections: GEORGEP. PETETIN PUBLICATIONS COMhfITTEE Standards: RUBEN CARLSON E. DONALDJ. PLUNKETT,Chairman W. H. OFFENHAUSER,JR. Sections PHILIPC. ERHORN A. A. PULLEY HELLMUTHETZOI,D RICHARDH. RANGER Cincinnati Pittsburgh F. SUMNERHALL WILI~IAMSAVORY Columbus San Francisco CLYDER. KEITH CARLETONR. SAWYER Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Editor, GEORGEHORIUCI-II Los Angeles Japan New York Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNAI~may be obtained from the Secretary, British Liaison P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Sound Recording Association London W. C. 1, England
Journal of the Audio Ei~gineeringSociety, Volume 5, Kumber 2, April 1957. Published quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Address manuscripts and all editorial correspondence to George Horiuchi, Columbia University, 632 West 126 Street, New Yorlr 2'7, N. Y. Copyright 1958 by the Audio Engineering Society. The Journal is indexed in the Applied Science d? Technology Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Publications Committee. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1956-57 President WALTER0. STANTON Executive Vice-President SHERMANM. FAIRCHILD Central Vice-President Amplitude Distortion as a Function of Frequency-C. C. Street . . 120 HENRYJ. SCI-IROEDER Western Vice-President Problems of Bass Reproduction in Loudspeakers-E. M. Villchur . . 122 Ross H. SNYDER Treasurer Concept of a New NIagnetic Recording Medium-J. Herbert 0rr . . 127 RALPHA. SCHLEGEL Secretary Basic Requirements for a Stereophonic System-Norman H. Crowhurst 129 C. J. LEBEL Past President The Consumer Looks at Standards-Donald M. Be~k 135 RICHARDH. RANGER ...... BOARD OF GOVERNORS A Corner Loudspeaker with Coaxial Acoustical Line-T. S. Korn . . 138
Subjective Discrimination of Pitch and Amplitude Fluctuations in Recording Systems-A. Stott and P. E. Axon . . . . 142
Noise in iflagnetic Recording Tapes-D. H. Howling . . . . . , 156
The Calibration of Disc Recordings by Light-Pattern Measurements COMMITTEE CHAIRMEN -P. E. Axon and W. K. E. Geddes ...... 167 Admissions: E. V. B. KETTLE~IAN Awards: ERNESTW. FRANCK AES News Convention: SIIERMANM. FAIRCHILD By-Laws of the Audio Engineering Society, Inc...... , 178 Employment Register: E. V. B. KETTLEMAN Finance: VICTORBROCINER Historical: C. A. RACKEY Laws and Resolutions: VINCENTJ. LIEBLER Since the statements and opinions which appear in the papers published in this Lecture Course: W. H. OFPENHAUSER,JR. Journal are expressions of their respective authors, the Society can assume no Membership: C. ROBERTPAULSON responsibility for them. Where, however, there exists controversy or disagree- Nominatioas: RICHARDH. RANGER ment, the Editor invites correspondence. Papers Procurement: CARLE. WARNER Publications: DONALDJ. PLUNKETT Public Relati~~ns:WII,LIAM A. SAVORY Sections: GEORGEP. PETETIN PUBLICATIONS COMMITTEE Standards: RUBENE. CARLSON DONALDJ. PLUNKETT,Chairman W. H. OFFENHAUSER,JR. Sections PHILIPC. ERHORN A. A. PULLEY Cincinnati Pittsburgh HELLMUTHETZOLD RICHARDH. RANGER Columbus San Francisco F. SUMNERHALL WILLIAMSAVORY Indiana Technical Rensselaer Polytechnic CI-YDER. KEITH CARLETONR. SAWYER College (student) Institute (student) Los Angeles Japan Application blanks for membership in the Audio Engineering Society New York and back numbers of the JOURNALmay be obtained from the Secretary, P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Liaison British Sound Recording Association London W. C. 1, England
Journal of the Audio ICnginerring S~~riety,Volurrle 5, Kumher 3, July 1957. Published quarterly by the Audio Engineering Society and sup1,lied to all members ,in good standing. Publication office, 104 Liberty Street, Ctica, X. Y. Executive and editorial office, P. 0.Box 12, Old Chelsea Statio~r. Ken- York 11. X. Y. Entered as second ciass matter at the post office at Utica, K. Y. Subscription to nonmembers, $8 per Tear. Copyright 1959 by the Audio Engineering Society. Tlie Journal is indexed in the AppIied Science 4 !Z'echllolog!l Inrlex. Permission tu reprint, in \\,hole or in pnrt, material originally appearing in the Journa! must he ohtailled in \v.riting from the Publications Committee. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1956-57 President WALTER0. STANTON Executive Vice-President SHERMANM. FAIRCHILD Some Notes on Artificial Reverberation-Carlos E. R. A. Moura and Central Vice-President Sergio Lara Cafnpos ...... 182 HENRYJ. SCHROEDER The High-Fidelity User Looks at Pickup Design-lulinn D. Hirsch . 187 Western Vice-President 1 Ross H. SNYDER I The Consumer's Viewpoint on High Fidelity-DonaM M. Bcrk ... 190 Treasurer RALPHA. SCHLEGEL 1 Some Defects irr Amplifier Performance Not Covered by Standard Secretary Specifications--Norman H. Crozvhurst ...... 195 C. J. LEBEL Past President The Design of a High-Fidelity Amplifier for Domestic Cse-T. S. Rorn 203 RICHARDH. RANGER BOARD OF GOVERNORS A Transistor Preamplifier Design for Magnetic Pickups-Harold J. Paz 208 VICTORRROCINER Problems and Considerations of Tape Duplicating Production C. ROBERTFINE -Julius A. Konins ...... 2 14 LEN FRANK E. V. B. KETTLEMAN Artificial Reverberation-P. E. Axon, C. L. S. Gillord, and CLAIRD. KREPPS D. E. L. Slzorter ...... 2 18 DONALDJ. PLUNKETT RICHARDH. RANGER Learning, a Major Factor Influencing Preferences for High-Fidelity Systems-Roger E. Kirk ...... 238 COMMITTEE CHAIRMEN Admissions: E. V. B. KETTLEMAN Book Reviews ...... 242 Awards: ERNESTW. FRANCK Convention: SHERMANM. FAIRCIIILD Subject Index ...... I Employment Register: E. V. B. KETTLEMAN Finance: VICTORBROCINER Author Index ...... ii Historical: C. A. RACKEY Laws and Resoltttions: VINCENTJ. LIEBLER Since the statements and opinions which appear in the papers published in this Lecture Course: W. H. OFFENI-TAUSER,JR. Journal are expressions of their respective authors, the Society can assume no Membe~slrip:C. ROBERTPAULSON responsibility for them. Where, however, there exists controversy or disagree- Nominations: RICHARDH. RANGER ment, the Editor invites correspondence. Papers Procttrement: CARLE. WARNER Pztblications: DONALDJ. PLUNKETT Public Relations: WILLIAMA. SAVORY Sections: GEORGEP. PETETIN PUBLICATIONS COMMITTEE Standards: RUBENE. CARLSON DONALDJ. PLUNKETT,Chairman W. H. OFFENHAUSER,JR. Sections PHILIPC. ERHORN A. A. PULLEY Cincinnati Pittsburgh HELLMUTHETZOLD RICIIARDH. RANGER Columbus San Francisco F. SUIWNERHALL WILI.IAMSAVORY Indiana Technical Rensselaer Polytechnic CLYDER. KEITH CARLETONR. SAWYER College (student) Institute (student) Los Angeles Japan Application blanks for membership in the Audio Engineering Society New York and back numbers of the JOURNALmay be obtained from the Secretary, British Liaison P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Sound Recording Association London W. C. 1, England
Journal of tlie sudio F.ngiiieering Society, Yolume 5. Kumher. 4, October 1957. Puhlished quarterly by the Sudio Engineering Society ;itid supplied to all men~bersin good standing.. Publication office. 104 liberty St~eet,Ctiea, X. I-. Executive and editorial officc, P. 0. Ros 12. Old Chelsee Station, Ke\\- York 11. S. Y. Xntered ws second ciass matter at the 11ost office at Ctica, K. T. Subscri1,tion to nonmembers, $8 per year. Copyright 1959 by the Audio Engineering Society. Tlle Journal is indesed in the Lpplied Science d Technologu Index. Perrnis*ion to rellrint. in n.liole or in part, material ol.iginnlI>- nppearlng in the Jonrna! m~~st1,e ol~rai~icd in AT-ritingfrom the l'uhlicntions Coinnittec.
Journal of the AU DIO ENGINEERING SOCIETY E s - OFFICERS FOR 1957-58 President SHERMANM. FAIRCHILD Editorial-G. Horiuchi ...... 66 Executive Vice-President DONALDJ. PLUNKETT Binaural and Stereophonic Sound-William H. Offenhaz~ser,Jr. ... 67 Central Vice-President H. E. ROYS A Compatible System of Stereo Transmission by FNI MultipIex Western Vice-President -Murray G. Crosby ...... 70 HERBERTE. FARMER Secretary An Artificial Stereophonic Effect Obtained from a Single Audio Signal C. J. LEBEL -Manfred R. Schroeder ...... 74 Treasurer RALPHA. SCHLEGEL I Stereophonic Sound Reproduction in the Home-Harry F. Olson . . 80 British Patent Specification 394,325-Alan Dower Blumlein ..91 BOARD OF GOVERNORS LEN FRANK 1s Tape the Ideal Medium for Audio?-Ross H. Snyder ..... 99 CLYDER. KEITH E. V. B. KETTLEMAN The 'Stereosonic' Recording and Reproducing System-H. A. M. Clark, CLAIRD. KREPPS G. F. Dutton and P. B. Vanderlyn ...102 CHESTERF. SCOTT WALTER0. STANTON Stereophonic Sound With Two Tracks, Three Channels By Means of a EMILP. VINCENT Phantom Circuit (2PH3)-Paul W. Klipsch .... 118
C COMMITTEE CHAIRMEN Admissions-E. V. B. KETTLEMAN Stereo Tape Standards-Symposium ...... 13 1 Awards-ROSS H. SNYDER Cosvention-DONA~.DJ. PLUNKETT Letter to The Editor ...... 143 Employment Register-E. V. B. KETTLEMAN Finance-VINCENT J. LIEBLER Date of Publication: June 27, 1958 Historical-C. A. RACKEY Since the statements and opinions which appear in the papers published in this Lectu~eCourse-F. SUMNERHALL Journal are expressions of their respective authors, the Society can assume no Membership-WALTER 0.STANTON responsibility for them. Where, however, there exists controversy or disagree- Papers Procurement-JOHN M. HOLLYWOOD ment, the Editor invites correspondence. Public Relations-S. M. FAIRCHILD Pttblicatioss-DONALD J. PLUNKETT PUBLICATIONS COMMITTEE Standards-RUBEN E. CARLSON DONALDJ. PLUNKETT,Chairman CLYDER. KEITH FRANKCOMERCI THEODORELINDENBERG Sections EDWINDICKINSON A. A. PULLEY Central New York Pittsburgh PHILIPC. ERHORN RICHARDH. RANGER Indiana Technical San Francisco HELLMUTHETZOLD College (student) Rensselaer Polytechnic Los Angeles Institute (student) Editor, GEORGEHORIUCHI New York Japan Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, British Liaison P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Sound Recording Association London W. C. 1, England
Journal of the dltdio Engineering Society, Volume 6, Xumhcr 2, April 1958. Pnblished quarterly I,y the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Address manuscripts and all editorial correspondence to George Horiuchi, Columbia Univerqity, 632 \Vest 125 Street, New Yorli 27, N. Y. Copyright 1958 by the Audio Engineering Society. The Journal is indexed in the AppZied Science & TechnoEoqg Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Publications Committee. Journal of the AU Dl0 ENGINEERING SOCIETY OFFICERS FOR 1957-58 I Presidest sHERh34~M. FALRCHILD I Executive Vice-President 'I'he Electrical Production of hlusic DONALDJ. PLUNI~ETT I --Alan Douglas, &f.I.R.E., &I..4 .I.E.li Central Vice-President H. E. ROYS Latest .idvances in Extra Fine Groove Recording -Peter C. Goldnzark ... Western Vice-President HERBERTE. FARMER 3Iusical Composition with a High-Speed Digital Conlputer Secretary -L. A. Hiller, Jr. and L. ilf. Isaacson ...... 154 C. J. LEBEL Technical Facilities for the Diplomatic Conference -D. D. Jones ...... 161 Acoustical Aspects of a Speech Communication System Designed for BOARD OF GOVERNORS Operation in High Level Ambient Noise-Roy G. Rlun~pp and John C. Wcbster...... 179 Some Basic Aspects of an Information Theory of Music -.4. Moles ...... 184 3Iylar I'olyester Film and Acetate as Base Materials for Magnetic Recording Tape-D. I>.Ornzotzd ...187 The Standard Tape as a Professional Audio Tool-Frank F.Richards . 193 A Sen7 \:iscous-Damped Tone Arm Development COMMITTEE CHAIRMEN -Chester -4. Snow, Jr...... Admissions-E. V. B. KETTLE~IAK The I'rocesses of Experimental Music A wards-Ross H. SNYDER -Vladi~nir .-I. Ussachc~isk?l Convention-DONALD J. PLUXKE~T Etnployment Register-E. V. B. KETTLEMAN F~~U~C~--VINCENTJ. LIEP,I.ER Since the statements and opinions which appear in the papers published in this Histori~ul-C. A. RACREY Journal are expressions of their respective authors, the Society can assume no Lecttcre Course-F. SU~INERHALL responsibility for them. Where, however, there exists controversy or disagree- ment, the Editor invites correspondence. Membership-WAI.TER 0. ST~NTON Pnpers Procurentent-JOHN M. HO[.LYWOOD I-, Public Relations-S. M. FAIRCHILD PUBLICATIONS COMMITTEE Pzrblications-DONALD J. PLUNKETT Standards-RUBEN E. C~RLSON DONALDJ. PLUNKETT,Chairman CLYDER. KEITH FRANKCOMERCI THEODORELINDENBERC EDWINDICKINSON A. A. PULLEY Sections PHILIPC. ERHORN RICHARDH. RANGER Central New Yark Pittsburgh HELLMUTHETZOLD Indiana Technical San Francisco College (student) Rensselaer Polytechnic Editor, GEORGEHORIUCHI L-os Angeles Institute (student) Associate Edit0.r~: NORMANE. CROWHURST,SHELDON I. WILPON New York Japan Editorial Assistants: ELIZARETHH. BEAUMONT,ISABELLE EMERSON Southern University (student) Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay he obtained from the Secretary, British Liaison P. 0. Box 12, Old Chelsea Station, New York 11, New York. Rritish Sound Recording Association London W. C. 1. England
Journal oi the Audio 1lngineel.ing Society. Volnme 6, Su~nber3, July 7958. Published quarterly by the Audio Engineering Society and supplied to 311 members in good stand in^. Publication office, 101 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Kew York 11, N. Y. Entered as second class matter at the post office at Utica, N. T. subscription to nonmembers, $8 per year. Address manuscripts and all editorial corresponde~~ceto 0. J. LeEel, Box 12. Old Chelsea. Stabion, Ne\v Tork 13. f. Y. Capyright 1959 by the Audio Engineering Smiety. The Journal is indexed in the Applied Science d Tnchno7,og:j I?~du.r. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Publications Committee. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1957-58 President SHERMANM. FAIRCHILD Executive Vice-President DONALDJ. PLUNKETT Central Vice-President The Limiting Tracking Weight of Gramophone Pickups for Negligible H. E. ROYS Groove Damage-D. A. Baf.10~ ...... 2 16 Western Vice-President HERBERTE. FARMER Mismatch Between Power Amplifiers and Loudspeaker Loads Secretary -Daniel R. von Recklinghausen ...... 220 C. J. LEBEL Treasurer RALPHA. SCHLEGEL The Finer Structure of Magnetic Tape: Microscope Studies -Reuben M. Cares, M.D...... 225 BOARD OF GOVERNORS LEN FRANK A New ,4pproach to the High Performance Turntable Problem CLYDER. KEITH -Rein Narma and E. P. Skov ...... 234 E. V. B. KETTLEMAN CLAIRD. KREPPS Application of Negative Impedance Amplifiers to Loudspeaker Systems CHESTERF. SCOTT -R. E. Werner and R. M. Carrell ...... 240 WALTER0. STANTON EMILP. VINCENT New Developments in Output-transformerless Amplifiers -J. Rodrigues de Miranda and J. J. Zaalberg van Zelst . 244 COMMITTEE CHAIRMEN Admissions-E. V. B. KETTLEMAN The Audio Engineers Exhibit and Tenth Annual Convention of the Awards-Ross H. SNYDER Audio Engineering Society ...... 2 51 Convention-DONALD J. PLUNKETT Employment Register-E. V. B. KETTLEMAN Date of Publication: September 29, 1958 P~%u%C~-VINCENTJ. LIEBLER Since the statements and opinions which appear in the papers published in this Historical-C. A. RACKEY Journal are expressions of their respective authors, the Society can assume no Lecture Course-F. SUMNERHALL responsibility for them. Where, however, there exists controversy or disagree- ment, the Editor invites correspondence. Membership-WALTER 0. STANTON Papers Procurement-JOHN M. HOLLYWOOD Public Relations-S. M. FARCHILD PUBLICATIONS COMMITTEE Publications-DONALD J. PLUNKETT Standards-RUBEN E. CARLSON DONALDJ. PLUNKETT,Chairman CLYDER. KEITH FRANKCOMERCI THEODORELINDENBERG EDWINDICKINSON A. A. PULLEY Sections PHILIPC. ERHORN RICHARDH. RANGER Central New Yark Pittsburgh HELLMUTHETZOLD Indiana Technical San Francisco Editor, GEORGEHORIUCHI College (student) Rensselaer Polytechnic Associate Edito.rs: NORMANE. CROWHURST,SHELDON I. WILPON Los Angeles Institute (student) Editorial Assistants: ELIZABETHH. BEAUMONT,ISABELLE EMERSON New York Japan Southern University (student) Application blanks for membership in the Audio Engineering Society and back numbers of the JOURNALmay be obtained from the Secretary, British Liaison P. 0. Box 12, Old Chelsea Station, New York 11, New York. British Sound Recording Association London W. C. 1, England
Journal of the Audio Engineering Society, Volume 6, Number 4, October 1958. Pablished quarterly by the Audio Sngineering Society and supplied to all members in good standing. Publication office, 101 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Address manuscripts and all editorial correspondence to George Horiuchi, Columbia University, 632 West 125 Street, New Yorli 27, N. Y. Copyright 1958 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Publications Committee.
Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1958-59 President DON~LDJ. PIUNKET~ Execlttive Vice-Pre~idettt How Much Audio Power?-Stanley If. Sessio~zs ...... 62 Cefttral Vice-President ARTHURG. EVANS,JR. Western Vice-Presiderrt The Distribution of Peak Energy in Recorded Music, and Its Relation \'IUCEKT s4Lh10\ to hlagnetic Recording Systems-Johu G A~lcKnight . . 65 Secretary 0. J. LEBEL Psychoacoustics Applied to Stereophonic Reproduction Systems- Treasirrer P~tei.C. Go1dnzai.k and John 31. IIolly~oood . . . . . R. .A. SCHLECPL
BOARD OF GOVERNORS Designing a Multi-Purpose Stereo Pre-Amplifier-J. Kodrigtres de Xi,.- SI-IERJIAXFAIRCHILD anda and H, 2). d. he~ckhoff ...... , 73 CL~DER. KEITH FR~LE. PONTITJS Tiine Error5 in llagnetic Tape Recording-Rogcr H. Prager . . Si CHESTERF. SCOTT Ross H. SNIDER Endless Loop Alagrletic Tape Tree-S. IY. Liddle . . 89 WALTER0. STANTON S. Eon.1~~SORENSOU EVIL P. VIYCEUT A Single-Element Stereophonic Cartridge-John F. Wood . . . 92
COMhIITTEE CHAIRMEN Standards: Stepchild it1 the Laboratory-C. E, White ...... 97 A dmiss~ons-C~~DER. KEITH A g1a1 cis-ROSS H. SNIDER AES News . . . . , . . . . , . 101 Convetitzoa-H~RRI L. BRX9NT ...... Employms?tt Regrstel-E. \'. B. KETILEM~V Phaace-R. A. SCHLECEL Hlsto?ical-C~E~T~RA. RACKEI- Laws B Rcsoltctiorrs-V. J. LIEBIER ;Ifen2be*shrp-J~~~~~~0. STANTON EDITORIAL BOARD Papels Protu~entewt-JOHN 'M. HOLLYWOOD Pzibl~cR~~~~~O+~F-JACQLELIP\E H~R\El S~ctions-DO\ ALD J. PLU~KETT Standaj ~J-RLREN E. CARLSOX
Managing Editor, JACQUELINEHAR\EI. SECTIONS Central New 1-ork San Franc~sco Associate Editors: NORIVIAUH. CROWHURST,SHFIDOX I. WILPON Indiana Technical Rensselaer Polytechnic College (student! Institute (student) Los Angeles Southern University New York (student) ;\lanuscripts and all editorial correspondence should be addressed to Pittsburgh Japan the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, New York 11, New York. Application blanks for membership and back numbers of the JOUHKALmay also be obtained from the Secretary. British Liaisort British Sound Recording Association London W. C. 1, England I
Jonruul of :Ire ludio Engii~eeringSociety, '\*olame 7, 'Xnmber 2, April 1959. Published quarterly by the Audio Engineering Society and sugplied to all members in good standing. Publication office, 101 Liberty Street, Ulica, N. P. Executive and editorial office: P. 0, Bos 12, Old Cllelsea Station, Ne~rPork 11, 1;. y. Entered as second class matter nt tlie post ofice at Ctica, N. Y. Subscription to nonmembers. $3 per year. Oopyriglit 1969 by the Audio Engineering Society. The Journal is indexed in the Applied Scicncs LG Technology Indez. Permission to re?rint, ill whole or in pan, n~ateriaioriginally appearing in the Journal must be obtained in writing from the Secretary. Journal of the AU Dl0 ENGINEERING SOCIETY
OFFICERS FOR 1958-59 President DONALDJ. PLUNKETT Exectctive Vice-president Corner Speaker Placement-Paul W. Klipsch ...... 106 HARRYL. BRYANT 1 Central Vice-President Recent Cone Speaker Developments-W. T. Fiala ...... 110 ARTI-IURG. EVANS,JR. Western Vice-president Some Thoughts on Geometric Conditions in the Cutting and Playing of VINCENTSALMON Stereodiscs and Their Influence on the Final Sound Picture Secretary C. J. LEBEL -1. L. Oonzs and C. R. Bastiaans ...... 115 Treasurer R. A. SCHLECEL The Deformation of Plastics with Hard, Spherical Indentors-D. G. Floln and C. M. Huggins ...... 122 BOARD OF GOVERNORS SHERhl4N FAIRCHILD High Speed Tape Duplication Up-To-Date-R. J. linkhanz and R. A. CLYDER. KEITH isberg ...... 12 5 FRANKE. PONTIUS CHESTERF. SCOTT A New Device for the Reduction of Print-Through-Frank Radocy . . 129 Ross H. SNYDER WALTER0. STANTON I/. S. EDWARDSORENSON Applying the Transistor in a Stereophonic Tape System-Dwight Jones 133 EXIILP. VINCENT Automatic Plotting of Cartridge Response-C. P. Gernzano ....13.5 COMMITTEE CHAIRMEN A dmissions-CLYDE R. KEITH AES News ...... 141 A wards-Ross H. SNYDER Convention-HARRY L. BRYANT Membership Information ...... 144 Employment Register-E. V. B. KETTLEMAN Finance-R. A. SCHLECEL H~s~~~~c~~-~HEsTERA. RACKEY Laws 63 Resolutions-V. J. LIEBLER Membership-WALTER 0. STANTON EDITORIAL BOARD Papers Procurement-JOHN M. HOLLYWOOD Public Relations-JACQUELINEHARVEY Sections-DONALD J. PLUNKETT Standards-RUBEN E. CARLSON
SECTIONS Managing Editor, JACQUELINEHARVEY Central New York San Francisco Indiana Technical Rensselaer Polytechnic Associate Editors: NORMANH. CROWHURST,SHELDON I. WILPON College (student) Institute (student) Los Angeles Southern University New York (student) Manuscripts and all editorial correspondence should be addressed to Pittsburgh Japan the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, New York 11, New York. Application blanks for membership and back numbers of the JOURNALmay also be obtained from the Secretary. British Liaison British Sound Recording Association London W. C. 1, England
-- -- Jo~unalof the Audio IiCngineerillg Society, Volume 7, Xurnber 3, July 1959. Published quarterly by the Audio Engineering Society and supplied to all members in good staudiilg. Publication office, 104 Liberty Street, Utica, N. P. Executive and editorial office, P. 0. Box 12, Old Cl~elseaStation, New York 11, N. T. Entered as second class matter at the post office at Utica, N. Y. Subscription to nonmembers, $8 per year. Copyright 1959 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. Permission to reprint, in -ivhole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the
AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1958-59 OCTOBER1959 VOLUME7, NUMBER4 President Editorial ...... 146 Executive Vice-President , Recent Developments in Stereo Disc Recording-John G. Frayne and HARRYL. BRYANT R. R. Dazlis ...... 147 Central Vice-President ~ 1 A New Stereo Feedback Cutterhead System-Rein Narnza and Norman ARTHURG. EVANS,JR. J. Anderson ...... 153 Western Vice-President Acoustics of Large Orchestral Studios and Concert Halls-T. Somerville VINCENTSALMON and C. L. S. Gilford ...... 160 Secretary Acoustoelectronic Auditorium-Harry F. Olson ...... 173 C. J. LEBEL Determination of the Recording Performance of a Tape from Its Mag- Treasurer netic Properties-Irving Levine and Eric D. Daniel . . 181 R. A. SCHLECEL Magnetic Characteristics of Recording Tapes and the Mechanism of the Recording Process-J. G. Woodward and E. Della Torre 189 BOARDOFGOVERNORS The Noise in Magnetic Recording Which Is a Function of Tape Charac- SHERMANFAIRCHILD teristics-Philip Smaller ...... 196 CLYDER. KEITH Magnetic Tape Recording with Longitudinal Or Transverse Oxide Orien- tation-Richard Dubbe 203 FRANKE. PONTIUS F...... Evolution of a Successful Spring-Driven, Broadcast-Quality Tape Re- CHESTERF. SCOTT corder-Albert C. Travis, Jr...... 207 Ross H. SNYDER Stereophonic Sound for the Videotape Recorder-Ross H. Snyder . . 213 WALTER0. STANTON A Compact, Single-Cabinet, Stereophonic Speaker System-Sidney E. S. EDWARDSORENSON Levy, George W. Sioles, and Victor Brociner ....2 17 EMILP. VINCENT A Three-Channel Stereophonic Sound Reinforcement Mixing Console -Philip C. Erhorn ...... 223 COMMITTEE CHAIRMEN The Development and Application of Synthetic Reverberation Systems Admissions-CLYDE R. KEITH -Lewis S. Goodfriend and John H. Beaumont ....228 Awards-Ross H. SNYDER Pocket Pagers-L. E. Philipps ...... 235 Convention-HARRY L. BRYANT 70-Watt Transistorized Public Address Equipment-Robert C. Acker , 239 Employment Register-E. V. B. KETTLEMAN Report-Magnetic Modulator Playback Technique for Audio Applica- Finance-R. A. SCHLECEL tions--Marvin E. Anderson ...... 243 Historicai-CHESTER A. RACKEY Book Review ...... 246 Laws d Resolutions-V. J. LIEBLER Letters to the Editor ...... 246 Membership-WALTER 0. STANTON AES News ...... 248 Papers Procurement-JOHN M. HOLLYWOOD Public Relations-JACQUELINE HARVEY EDITORIAL BOARD Sections-DONALD J. PLUNKETT Editor-in-Chief: WALTERH. ERIKSON Managing Editor: JACQUELINEHARVEY Standards-RUBEN E. CARLSON Associate Editors: NORMANH. CROWHURST,SHELDON I. WILPON Copy Editor: ELEANORHYDE SECTIONS Assistant Editors Central New York San Francisco FRANKCOMERCI MARVINB. HERSCHER Indiana Technical Rensselaer Polytechnic EDWINDICKINSON CLYDER. KEITH College (student) Institute (student) PHILIPC. ERHORN THEODORELINDENBERG Los Angeles Southern University HELLMLTHETZOLD A. A. PULLEY New York (student) RICHARDH. RANGER Pittsburgh Japan Manuscripts and all editorial correspondence should be addressed to the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, British Liaison New York 11. New York. Aaalication blanks for membershia and back numbers of the may also be obtained from the-secretary. British Sound Recording Association JOURNAL London W. C. 1, England L.. L.. I
Journal of the Audio Engiueering. Society, Volume 7, Kumher 4, October 1959. Published quarterly by the Audio Xngineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Sew York 11, N. P. Entered as second class matter at the post office at Utica, S. Y. Subscriptions to nonmeml~ers,$8 pcr pear. Copyright 1959 by the Audio Engineering Society. The Journal is indexed in the Applied Science & !fechnology Index. Permission to reprint, in whole or in part, material originally appearing in the Jonrnel must be obtained in xriting from the Secretary. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1959-60 President HARRYL. BRYANT Executive Vice-President Progress Report oi Panel 1 of the National Stereophonic Radio HARRYF. OLSON Committee-Charles J. Hirsch ...... Central Vice-President Acoustics of Sound Reproduction in the Home-Harry F. Olson and W. EARLSTEWART Herbert Belar ...... Western Vice-President Stereo Disk Problems-Erling P. Skov ...... WALTERT. SELSTEI) Transistor ac Amplifiers with High Input Impedance: A Survey Secretary -1. A. Ekiss ...... C. J. LEBEL A Suggested Method for Nleasuring Tape Modulation Noise -James J. Davidson ...... A New Equalization Characteristic for Master Tape Recording BOARD OF GOVERNORS -A. A. Goldberg and &nil L. Torick ...... A Survey of Some New Tubes for Audio Output Applications SHERMANFAIRCHILD -Robert E. Moe ...... FRANKE. PONTIUS Synthetic Reverberator-Harry F. Olson and John C. Bleazey .... WILLIAMB. SNOW Design and Development of an Engineering Report-George B. Goodall Ross H. SNYDER S. EDWARVSORENSEN Eliminating the Stereo Seat-John Mosely ...... WALTER0. STANTON Properties of Base Materials Used for the Manufacture of Magnetic EDGARM. VILLCHUR Recording Tape-Edward Schmidt ...... COMMITTEE CHAIRMEN New York Convention 1959 ...... Eleventh Annual Convention Program ...... A dmissions-S. EDWARDSORENSEN A wards-Ross H. SNYDER Letters to the Editor ...... Conventio%-HARRY F. OLSON AES News ...... Employment Register-E. V. R. KETTLEMAN Current Publications on Audio ...... Exhibits-HARVEY SAMPSON,JR. Finance-R. A. SCHLECEL ~~~S~OV~C~~-CHESTERA. RACKEY EDITORIAL BOARD Laws 8 Resolutions-V. J. LIEBLER Editor-in-Chief: WALTERH. ERIKSON Membersitip-H~~\~~uSA~IPSON, JR. Managing Editor: JACQUELINEHARVEY Nominations-DONAI,D J. PLUNKETT Associate Editors: NORMANH. CROWI~UKST,SHELIION I. WILPON Papers Procurement-JOHN M. HOLLYWOOD Copy Editor: ELEANORHYVE Ptiblic Re~ations-JAcQu~~.l~~HARVEY Sections-HARRY L. BRYANT Assistant Editors Stanrlatds-EI~AR M. VII.LCIIUR
SECTIONS Central New York San Francisco Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Los Angeles Southern University Manuscripts and all editorial correspondence should be addressed to New York (student) the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, Pittsburgh Japan New York 11, New York. Application blanks for membership and back numbers of the JOURNALmay also be obtained from the Secretary. British .Liaison British Sound Recording Association London W. C. 1, England
Jourilal of the ludio Enginerring Society, Volume 8, Surnber 1, January 1960. Published qnitrter~lyby the Audio Kngineering. Society and supplied to ail members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Sew York 11, N. 1'. Entered as second class matter at the post office at Utica, K. '. Snhbcl.il~tioni;ro nonmrnlbers, $8 gel. ycar. Copyright 13(i0 i~y the Audio Engineering Society. The Journal is indexed in the Applied Science d. Technology Index. Permission to reprint, in whole or in part, material originally appearing in tile Jo111,nnl IIIII~~be ol~tainedin ~vritingfrom the Secretary. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1959-60 President HARRYL. BRYANT Executive Vice-President Perception of the Stereophonic Effect as a Function of Frequency HARRYF. OLSON -WiEliavz H. Beaubicn and Harwood B. Moore ... Central Vice-President Why Stereo? The Philosophy of Multichannel Recording of Music W. EARLSTEWART -Jolzn G. Mclinight ...... Western Vice-President WALTERT. SELSTED Broadening the Area of Stereophonic Perception-Benjamin B. Bazter Secretary Stereo as an Integral System-1Z'orwzan H. C~owhurst ...... C. J. LEBEL The Design and Use of a Double Cardioid Stereophonic AIicrophone -Antlzony Ja?nroz ...... The 120-ips Tape Duplicator for Four-Tracli Cominercial Stereo Tapes BOARD OF GOVERNORS -R. '1. Isberg ...... Recording Studio and Control Room Facilities of Advance Design SHERMANFAIRCHILD -A!Iilton T. Pzttnavz ...... FRANKE. PONTIUS Equalized Stereo Preamplifier for Professional Use-Erling P. Skov . WII.LJAMB. SNOW Ross H. SNYDER Stereophonic Patterns-Benjanzin B. Bauer and George W. Sioles . . S. EDWARDSORENSEN The Tape-Head Relationship in Multitrack Recording-Fraze~ Leslie WALTER0. STANTON EDGARM. VILLCI-IUR Audio Isolation ATetworlis-Henry Korkes ...... COMMITTEE CHAIRMEN Manufacture and Use of Double Coated Tape for Continuous Cartridges-Lnw~ence E. Knees ...... Admissions-S. EDWARDSORENSEN A wards-Ross H. SNYDER Letters to the Editor ...... Coevention-HARRY F. OLSON ,4ES News ...... E~nploymentRegister-E. V. B. KETTLEMAN Current Publications on Audio ...... Exhibits-HARVEY SAAIPSON,JR. Finance-R. A. SCHLEGEL Hi~t~ri~al-CHESTERA. RACKEY Laws d Resolutions-V. J. LIERLER EDITORIAL BOARD hfembership-HARVEY SAPIPSON,JR. Editor-is-Chief: WALTERH. ERIKSOX Nominations-DONALD J. PLUNKETT Managing Editor: JACQUELINEHARYEY Papers Procurement-JOHN M. HOLLYWOOD Associate Editor: SHELDONI. WILPON Public R~~~~~~~S-JACQUELINEHARVEY Copy Editor: ELEANORHYDE Sections-HARRY L. BRYANT Standurds-EDGAR M. VILLCHUR Assistant Editors
SECTIONS Central New York San Francisco Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Los Angeles Southern University New York (student) hlanuscripts and all editorial correspondence should be addressed to the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, Pittsburgh Japan New York 11, New York. Application blanks for membership and back numbers of the .~OUKNAL may also be obtained from the Secretary. British Liaison British Sound Recording Association London W. C. 1, England
.Joarn:~l of the Audio Engineering Society, T701umr 8. Su~nber2, April 1'360. Published qu;rrterly Ly the .iudio Engir~ecviiig Society nrld supplied 'o all members in good stirndit~g. Publication office. 104 Liberty Street, Utica, S. Y. Ese~:uti\-e;~nd editorial oftice, P. 0. Box 12, Old Chelsea Station, Sen- Turk 11, N. P. Entered as secoi~dclass matter art tlir post office at 1.- tic;^, S.T. Subscriptions to nonnieml~ers,$8 per year. Cogyrigl~t1960 11y :ha Andio >;ngi~~eeringSociety. Tile Journal is indexed in tlie Applied Sriei,ru LL: JI'~(.Iz?tolog~Indez. Perlnission to reprint, in whole or in part, matesial originnlly appearing in tile Joarnal inuzt bc oblained in ~rritiilg.from the Secretary. Journal of. the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1959-60 President HARRYL. BRYANT Executive Vice-President HARRYF. OLSON The Frequency Response of Magnetic Recorders for Audio Central Vice-President --John G. McRnight ...... W. EARLSTEWART Stereo Disli Problems (Addendum)-Erling P. Skov .... Western Vice-President Chemical Analysis of Magnetic Recording Tape-C. V. Green ... WALTERT. SELSTED Photo-Sensitive Resistor in an Overload-Preventing Arrangement Secretary -J. Rodrigues de Miranda ...... C. J. LEBEL Maximum Peak Velocity Capabilities of the Disk Record Staford Treasurer -J. W...... R. A. SCEILECEL A Full-Track, Stereophonic, Magnetic Record-Reproduce Head -Ur. S. Latham ...... BOARD OF GOVERNORS Precise Measurement of Large Dynamic Response Characteristics of WILLIAMS. BACHMAN Audio Networks-David S. Cochran ...... SHERMANFAIRCHILD The Use of 35-mm Sprocket-Type Magnetic Film in Recording FRANKE. PONTIUS Phonograph Masters-John G. Frayne and J. W. Stafford WILLIAMB. SNOW Some Characteristics of a Variable Transmission Network for Audio Ross H. SNYDER Signals-Jacob Klapper and Cyril M. Harris .... S. EDWARDS~RENSEN Acoustic Instrumentation for Measurements in the Minuteman Missile WALTER0. STANTON Silo-David N. Keast and George W. Kalnpernzan . . EDGARM. VILLCHUR A Signal Biasing Output Transformerless Transistor Power Amplifier -Richard C. Heys~r ...... COMMITTEE CHAIRMEN The Effect of ac Bias Waveform on Harmonic Distortion in Magnetic Admissions-S. EDWARDSORENSEN Tape Recording-Robert P. Schroeder ...... A wards-Ross H. SNYDER A Low-Distortion Volume Expander for Home Use-R. J, Matthys . Convention-HARRY F. OLSON Seventh Annual Western Convention and Exhibit ...... Employment Register-E. V. B. KETTLEMAN AES News ...... Erhibits-HARVEY SAI\IPSON,JR. Current Publications on Audio ...... Finance-R. A. SCHLECEL H~S~OY~C~~-CHESTERA. RACKEY Laws d Resolutions-V. J. LIEBLER Membership-HARVEY SAMPSON,JR. EDITORIAL BOARD Nominations-DONALD J. PLUNKETT Managing Editor: JACQUELINEHARVEY Papers Procurement-JOHN M. HOLLYWOOD Associate Editor: SHELDONI. WILPON Public Relations-JACQUELINEHARVEY Copy Editor: ELEANORHYDE
Assistant Editors
SECTIONS Central New York San Francisco Indiana Technical Rensselaer Polytechnic College (student) Institute (student) Los Angeles Southern University Manuscripts and all editorial correspondence should be addressed to New York (student) the Secretary, Audio Engineering Society, Box 12, Old Chelsea Station, Pittsburgh Japan New York 11, New York. Application blanks for membership and back numbers of the JOURNALmay also be obtained from the Secretary. British Liaison British Sound Recording Association London W. C. 1, England
Journal of tile Audio Engineering Society, Volume 8, Number 3, July 1960. Published quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica. N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Sew York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscriptions to nonmembers, $8 per year. Copyright 1960 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1959-60 President HARRYL. BRYANT Executive Vice-President HARRYF. OLSON Cenfral Vice-President Portable Facilities for International Conferences-D. D. Jones ... W. EARLSTEWART Western Vice-President Application of Limiter Amplifiers to Stereophonic Signals WALTERT. SELSTED -D. S. McCoy ...... Secretary Practical Aspects of High-Fidelity Disk Recording. Part 1 C. J. LEBEL -Carlos E. R. A. Moura ...... Treasurer R. A. SCMLECEL Synchronous Audio-Visual Display Techniques-John T. Mz~llin . . BOARD OF GOVERNORS High-Resolution Stereo Magnetic Head for Four-Track Application WILLIAMS. BACHMAN -A. ,4. Sariti ...... SHERMANFAIRCHILD DON~LDJ. PLGNKETT Multichannel Recording for Mastering Purposes-Mort Fujii, George FRANKE. PONTIUS Rehklau, John McKnight, and William Miltenburg . WILLIAMB. SNOW Ross H. SNYDER Physical Conditions for Optimum Bass Reflex Cabinets-L. Keibs . . S. EDWARDSORENSEN Letters to the Editor ...... WALTER0. STANTON EDGARM. VILLCHUR AES News ...... COMMITTEE CHAIRMEN Current Publications on Audio ...... Admissions-S. EDWARDSORENSEN ~r Awards-Ross H. SNYDER Subject Index ...... Convention-HARRY F. OLSON Employment Register-E. V. B. KETTLEMAN Author Index ...... Exhibits-HARVEY SAMPSON,JR. Finance-R. A. SCHLECEL Hi~torica~-C~EsTERA. RACKEY Laws 8 Resolutions-V. J. L~EBLER EDITORIAL BOARD Membership-HARVEY SAMPSON,JR. h'ominations-DONALD J. PLUNKETT Papers Procurement-JOHN M. HOLLYWOOD Public Relafions-JACQUELINEHARVEY Sections-HARRY L. BRYANT Standards-EDGAR M. VILLCHUR SECTIONS Managing Editor: HARVEY Central New York San Francisco JACQUELINE Indiana Technical Rensselaer Polytechnic Copy Editor: ELEANORHYDE College (student) Institute (student) Los Angeles Southern University New York (student) Address manuscripts and editorial correspondence to the Secretary, Audio En- Pittsburgh Japan gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary. British Liaison British Sound Recording Association London W. C. 1, England
Joomal of the Sudiu Engineering Society, Volu,me 8. Xun~bev 4. October 1960. Published quarterly by the Audio Engineering Society and sopplied to all members in good standing. Publication office, 104 Liberty Street, Utica. N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Sew York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscriptions to nonmembers, $8 per year. Copyright 1960 by the Audio Engineering Society. The Journal is indexed in tlre AppEied Science 42 techno log^ Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the - AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1960-61 President HARRVF. OLSON Executive Vice-President HERMOKH. SCOTT What is Psychoacoustics?-Gerard G. Harf,is ...... Central Vice-President Effect of System Parameters on the Stereophonic Effect-llarwood B. L. R. RCRROUGHS MOOYP ...... Western Vice-President PELLKRUTTSCHN~TT Distortion of Auditory Perspective Produced by Interchannel Mixing at Secretary High and Low Audio Frequencies-Llonald S. McCoy . C. J. LEBEL Subjective Evaluation of Factors Affecting Two-Channel Stereophony- Treastcrer F. K. Harvey and M. R. Schroeder ...... R. A. SCHLEGEL Listening Tests Methods and Evaluation-K. Schjonneberg and F. Olson BOARD OF GOVERNORS The Magnetic Tape Recording Process in Terms of the Preisach Repre- sentation-G. Schwantke ...... Experimental Determination of the Effectiveness of Microphone Wind Screens-John C. Bleazey ...... Loudspeaker Testing in Rooms-William B. Snow ...... Practical Aspects of High-Fidelity Disk Recording. Part 2-Ca~los E. R. A. Moura ...... Special Section: Fall Convention 1960 ...... AES Awards ...... COMMITTEE CHAIRMEN Complete Convention Program ...... Preprints 1960 Fall Convention Papers ...... Membership Information ...... Letters to the Editor ...... Section Meeting Reports ...... Sound Track ...... Finance-R. A. SCI~LEGEL ffistorica~-C~E~T~~A. RACKEY Laws B Resolutions-V. J. LIEBLER Membership-M. R. SCITROEDER No.minations-H4~~~L. BRYANT EDITORIAL BOAR11 Papers Procurement-TROY RRAINARD Pzcblic Re~atio~rs-J4c~u~1,1~~HARVEY Sections-L. R. BURROUGHS Standards-EDGAR M. VILLCHUR Sustaining ~VIemberships- DONALDJ. PLUNKETT SECTIONS Managing Editor: JACQUELINEHARVEY Indiana Technical San Francisco Copy Editor: ELEANORHYDE College (student) Rensselaer Polytechnic Los Angeles Institute (student) New York Southern University Address manuscripts and editorial correspondence to the Secretary, Audio En- Pittsburgh (student) gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- Japan bership information and back copies may also be obtained from the Secretary. Britislt Liaison British Sound Recording Association London W. C. 1, England
Journal of the Audio Engineering Society, Volume 9, Xnmber 1, Janiiary 1961. Publishcd quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0.Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post oftice at Utica, N. Y. Subscriptions to nonmembers, $8 per year. Copyright 1861 by the Audio Engineering Society. The Journal is indexed in tho dpplied Science d Technology Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the AUDIO ENGINEERING SOCIETY
OFFICERS FOR 1960-61 President HARRYF. OLSON Executive Vice-President The Effect of Bias Amplitude on Output at Very Short Wavelengths HERMONH. SCOTT --John G. McKnight ...... Central Vice-President Tape Duplicating Systems for Talking Boolr Program-S. Himmelstein L. R. BURROUGHS Western Vice-President Visible Magnetic Recordings-W. P. Guckenburg and C. D. Mee . . PELLKRUTTSCNNITT Some Aspects of Wear and Calibration of Test Records Secretary -Roger Anderson C. J. LEBEL ...... Treasurer Reproduction Distortion-Its Measurement and Influence on Stereo R. A. SCI-ILEGEL Phonograph Cartridge Design-Philip Rant~owitz . . BOARD OF GOVERNORS The Design of Low-Noise Transistor Audio Amplifiers -James TV. Halligan ...... High Quality High Reliability Amplifiers for Speech Input Systems -James J. AVoble ...... Delay Line for Stereophonic Broadcasting-R. E. Lafierty A Stereophonic Transn~issionSystem for AM Broadcasting -John ill. Hollywood and illarvin Kronenbe~g ... The Electrostatic Earphone-W. T. Selsted ...... Stereophonic Earphones and Binaural Loudspeakers-B. B. Bauer COMMITTEE CHAIRMEN . A High Sensitivity Power Pentode Using the "Shadow Grid" Technique -J. W. Trautwein and C. D. McCool .... Report on Audio Equipment in Education ...... Letters to the Editor ...... Section Meeting Reports ...... Sound Track ...... Laws @ R~so~u~~o~s-V.J. LIEBLER Membership-M. R. SCHROEDER Membership Information ...... No.minations-HARRY L. BRYANT Papers Procurement-TROY BR~INARD EDITORIAL BOARD Public Relations-JACQUEI.INE HARVEY Sections-L. R. BURROU~HS Standards-EDGAR M. VILLCHUR Sustaining Memberships-
SECTIONS Indiana Technical San Francisco College (student) Rensselaer Polytechnic Managing Editor: JACQUELINEHARVEY Los Angeles Institute (student) Copy Editor: ELIZARETHBRAHAM New York Southern University Pittsburgh (student) Address manuscripts and editorial correspondence to the Secretary, Audio En- Japan gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- British Liaison bership information and back copies may also be obtained from the Secretary. British Sound Recording Association London W. C. 1, England
Journal of tho Audio LSngineeril~p Society, Vulnme 9, Ku~nher2, April lgfil. Puhlislied qu>rrter.ly1)g the .Audio Enginer~.ingSociety and suyl~lied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class mntter at the post office at rtii.;c, S. Y. Subsrri~~ti~lnsto ~lonlnernhers, $11 11~1.yeilr. Col,yright 1961 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. Permission to reprint, in wrhole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the
AU DIO ENGINEERING SOCIETY E s
OFFICERS FOR 1960-61 President HARRYF. OLSON Acoustic Considerations in the Design of Recording Studios Executive Vice-President HERMOE;H. SCOTT -M. Rettinger ...... 178 Central Vice-President Sound Control Techniques for the Legitimate Theatre and Opera L. R. BURROUGHS -Harold Burris-Meyer and Vincent iVlallory .... 184 Western Vice-President PELLKRUTTSCHNITT Reverberation System for Home Entertainment Equipment Secretary -Harrison E. Dow and Maurice E. Swift ..... 187 C. J. LEBEL "Colorless" Artificial Reverberation-&f. R. Schroeder and B. F. Logan 192 Treasurer R. A. SCHLEGEL Artificial Reverberation Facilities for Auditoriums and Audio Systems -G. R. Crane and G. A. Brookes ...... 198 BOARD OF GOVERNORS Sonic Window in the Ocean-Dan,iel W. Painter, II ...... 205 WILLIAMS. BACHMAN HARRYL. BRYANT A Modern Acoustic Missile Launch Locator, the AN/TNS-5 MURRAYG. CROSBY -R. M. Ca~relland R. Richter ...... 208 Design of a Stereophonic Pickup Cartridge-G. A. Morrell, Jr. ... The Use of Polyester Films in Microphone Designs-Alexis Badrtzaieff Broadcasting Closed Circuit and Via Public Transmission Channels Through Master Control Facilities in the Loeb Student Center, New York University-Werner F~eitag .. COMMITTEE CHAIRMEN Obituaries ...... Letters to the Editor ...... A wards-Ross SNYDER Convention-HERMON H. SCOTT Book Reviews ...... Exhibits-H~~v~ySAS~PSON, JR. Section Meeting Reports ...... MURRAYG. CROSBY Membership Information ...... Fi~zance-R. A. SCHLEGEL H~S~O~~C~~-CHESTERA. RACKEY Sound Track ...... Laws B Resolzctions-V. J. LIEBLER [Yest Coast Convention ...... Membership-M. R. SCHROEDER Nominations-HARRY L. BRYANT Papers Procurement-JOHN M. HOLLYWOOD EDITORIAL BOARD Public ~e~ations-J~c~u~~1~~HARVEY Sectiolzs-L. R. BURROUGHS Standards-EDGAR M. VILLCHUR Sustaining Memberships- DONALDJ. PLUNKETT SECTIONS Indiana Technical San Francisco Managing Editor: J~~Q~ELINEHARVEY College (student) Rensselaer Polytechnic Prodztction Edit0.r: IRMAVAN STEENBURGI~ Los Angeles Institute (student) New York Southern University Copy Editor: ELIZABETHBRAHAM Pittsburgh (student) Japan Address manuscripts and editorial correspondence to the Secretary, Audio En- British Liaisos gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary. British Sound Recording Association London W. C. 1, England
Jourilal of the Audio Erlgiileering Society, 7-olilnre 9, Surnber 3. July 1961. Published yuarterl? by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post office at Utica, X. T. Snbscriptiona to nonmembers, $11 per year. Copyright 1961 by the Audio Engineering Society. The Journal is indexed in the Applied Science d2 Technologg Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. Journal of the
AU DlO ENGINEERING SOCIETY E s
OFFICERS FOR 1960-61 President HARRYF. OLSON Executive Vice-President HERMONH. SCOTT A Study of Interference Effects in Magnetic Recording Central Vice-President -J. G. Woodward and M. Pradervand ..... L, R. BURROUGHS Western Vice-President *4utomatic Tape Reversing Mechanism for Continuous Play of Four PELLKRUTTSCHNITT Track Stereo Tapes-A L. Berg and K. M. LYilliamson Secretary Amplitude Control of Loudspeaker Cone Motion in the Resonance C. J. LEBEL Frequency Range-Walter C. Trautman ...... Treasurer R. A. SCHLECEL A New Tool for the Exploration of Unknown Electronic Music BOARD OF GOVERNORS Instrument Performances-Harald Bode ...... WILLIAMS. BACHMAN European Electronic Music Instrument Design-Harald Bode ... HARRYL. BRYANT Electronic Production of Percussive Sounds-Herb Hearne .... MURRAYG. CROSBY New Trends for Stereo Recording Consoles-Philip C. Erhorn ... SHERMANM. FAIRCHILD . JOHN M. HOLLYWOOD A Small Unidirectional Dynamic Probe Microphone-Ernest Seeler DONALDJ. PLUNKETT Personal Microphones-H. F. Olson, J. Preston and J. C. Bleazey . . M. R. SCHROEDER The Transmission of Room Information-Klaus Wendt ... WILLIAMB. SNOW EDGARVILLCHUR A New Reverberation Device for High Fidelity Systems -H. E. Meinema, H. A. Johnson and W. C. Laube, Jr. . COMMITTEE CHAIRMEN Design Considerations of Portable Transistorized Public Address A dmissions-W~~~~A~S. BACHMAN Systems-Joel Julie ...... A wards-ROSS SNYDER Convention-HERMON H. SCOTT Book Review ...... Exhibits-HARVEY SAMPSON,JR. . Section Meetings ...... MURRAYG. CROSBY Finance-R. A. SCHLEGEL Membership Information ...... H~S~O~~C~~-CHESTERA. RACKEY Subject and Author Index ...... Laws B Resolutions-V. J. LIEBLER Membership-M. R. SCHROEDER Nominations-HARRY L. BRYANT Papers Procurement-JOHN M. HOLLYWOOD EDITORIAL BOARD Public R~~O~~~~~-JACQUEL~NEHARVEY Sections-L. R. BURROUGHS Standards-EDGAR M. VILLCHUR Sustaining Membershijw- DONALDJ. PLUNKETT SECTIONS Indiana Technical San Francisco Managing Editor: JACQUELINEHARVEY College (student) Rensselaer Polytechnic Los Angeles Institute (student) Production Editor: IRMAVAN STEENBURGH New York Southern University Copy Editor: ELIZABETHBRAHAM Pittsburgh (student) Japan Address manuscripts and editorial correspondence to the Secretary, Audio En- British Liaison gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary. British Sound Recording Association London W. C. 1, England
Journal of the Audio Engineering Society, Volume 9, Number 4, Octobes 1961. Pnhlished quarterly b~ the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station. New York 11, N. Y. Entered as second class matter at the post office at Utica, PT. Y. Subscriptions to nonmembers, $11 per pear. Copyright 1961 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary.