3 Park Avenue, New York, NY 10016-5990

Noise Control and Acoustics Division Newsletter Gary H. Koopmann, Editor Fall 1998

Professor Ffowcs Williams’ students Get Involved in John Ffowcs Wil l i a m s study areas related to the aeroacoustics of supersonic flight and quieting of under- Your Division Receives Per Bruel water platforms. His work helped make e are off to anti-sound useful for noise control and for another Gold Award stabilizing aeromechanical systems. He Wgreat year HE PER was prominent in the Concorde program. for the Noise Con- BRUEL GOLD Born in Wales, educated in England and trol and Acoustics TMEDAL FOR awarded an engineering apprenticeship Division. I look for- NOISE CONTROL with Rolls-Royce before going to the Uni- ward to hearing AND ACOUSTICS versity of Southampton, England, from our 650+ mem- was established in Ffowcs Williams has had a long-standing bers in the months honor of Dr. Per commitment to bring academic research to Mardi Hastings ahead. Please let me Bruel, who pio- bear on industrial problems. Professor Incoming Chair know how we can neered the develop- Ffowcs Williams had held various positions make NCAD more John Ffowcs Williams ment of highly such as the chair of the consulting compa- responsive to your needs. In particular sophisticated noise ny, Topexpress Ltd., in Cambridge, execu- the Executive Committee would like to and vibration measuring and processing tive consultant to Rolls-Royce, and a direc- see more participation by our members equipment. The medal recognizes eminent tor of VSEL plc, Barrows-in-Surness. He from industry. If you would like to vol- achievement and extraordinary merit in now heads the division of the University of unteer for technical committees, newslet- the field of noise control and acoustics, Cambridge whose work focuses on fluid ter, or any of the other many activities in including useful applications of the princi- mechanics, aeronautics, thermodynamics our division, or just want to let me know ples of noise control and acoustics to the and turbomachinery. He is also master of how the Division can better serve your art and science of mechanical engineering. Emmanuel College at Cambridge. needs, please contact me by phone (614- PROFESSOR JOHN EIRWYN FFOWCS Professor Ffowcs Williams professional 292-2271) or e-mail ([email protected]). WILLIAMS, F.Eng., C.Eng., Ph.D., Sc.D., memberships include being a Special Life This is your Division – get involved! of the , England, Member of ASME International and is a Thanks to our many volunteers this was honored for his contributions to the Fellow of the following: the American past year, we will have 21 technical ses- understanding of aeroacoustic phenomena and Institute of Aeronautics and Astronautics; sions at the ASME International Mechani- of the interaction between fluid dynamics and the Acoustical Society of America; the cal Engineering Congress and Exhibition acoustics, and for sustained leadership in the Institute of Mathematics and its Applica- in November. Session titles and schedule application of theoretical acoustics to practical tions; the Cambridge Philosophical Soci- are provided in this newsletter. A problems of noise control. ety; the Royal Academy of Engineering; detailed program which includes a listing Professor Ffowcs Williams is the first the Royal Aeronautical Society; the Insti- of the presentations and authors is avail- Holder of the Rank Chair of Engineering, tute of Acoustics; the Institute of Physics; able on the web if you have not already which was established in 1972 in the field and the Royal Society of Arts. received one in the mail. These sessions of acoustics, at the University of Cam- Professor Ffowcs Williams had earned cover many aspects of noise control and bridge, England. Prior to that he held the a bachelor’s degree in 1958, doctorate in Rolls-Royce Chair in Theoretical Acous- 1960 in aeronautical engineering, a mas- (continued on page 2) tics at the Imperial College, London. ter’s in 1972 and a doctorate in 1986.

1 Incoming Chair’s Message As a society, ASME is working hard to (continued from page 1) Division In make this event serve the member’s needs. They are exploring ways to acoustics and will have broad appeal to Transition increase attendance and decrease registra- ASME members from all areas. Sessions Outgoing Chair’s Remarks tion costs. ASME is exploring a wide in aircraft noise, vehicle noise, and active range of options that will help reduce the noise control of aircraft and aerospace s you read this column it will al- cost of publishing technical papers which vehicles are special highlighted sessions eady have been a few months is a major expense item. Some of the for the Congress. Professor Gary Koop- Asince I passed on the Division ideas being considered include providing: mann will present this year’s Rayleigh Chair duties to the very capable Dr. conference proceedings on a CD/ROM, Lecture on Thursday afternoon. His pre- Mardi Hastings. Although most Chairs “on demand printing” of papers at con- sentation, “Designing Quiet Structures – serve this position in their last year on the ferences, and society transactions on the Virtually,” will include details of a virtual Executive Committee I have the pleasure internet. A few of these ideas have reconstruction of the Liberty Bell so that of serving another year before my five- already been implemented on a test basis. the audience will be able to hear how it year appointment ends. This allows me These are all exciting and it will be inter- sounds before and after the crack. It the opportunity to focus on efforts that esting to see what is adopted. The future should be an exciting event. are of more direct benefit to the Division will clearly have a form of information The NCAD web page has been moved rather than trying to keep up with society dissemination different from what is used to the ASME server and updated by our related administrative issues. today. past Chair, Ted Farabee. Please check it The Division, as is ASME itself, is in a As a means to improve communica- out at www.asme.org. Just click on “Tech- period of transition. I will touch on a few tions the Division initiated a Division nical Programs,” then “Technical Divi- of the changes that I see happening. WebPage in early 1997. I want to thank sions” to find the “Noise Control and Until a few years ago Division member- Dr. Andy Seybert for taking on the task of Acoustics Division” on the web. As ship was growing at a fairly healthy rate. getting the WebPage up and running. always, we would appreciate receiving In the last few years, the Division mem- Like so many things, it is these first steps your comments and suggestions for bership has reached a plateau and actual- that are the hardest. The Division hopes improvements. Planning and preparation ly dropped slightly. It is not clear whether that the ready access the internet offers for the 1999 Congress at the Opryland this is due to membership saturation, eco- can be used to greatly increase our com- Hotel in Nashville, TN, are already nomic pressures, or other causes. I will munication with our diverse member- underway. Sean Wu, Department of note that our trend in membership pretty ship. Posting information on a WebPage Mechanical Engineering, Wayne State much parallels that of other Divisions. is certainly much cheaper than a mass University, will be the 1999 Program Although ASME frowns on declining mailing. The address (URL) for the Web- Chair. The 1999 plans that were initiated membership, it is not necessarily bad. Page is http://www.asme.org/divi- last year at the Technical Committee However, all members should do what sions/noisecontrol. I strongly encourage meetings will be finalized during the they can to ensure their colleagues are all members to visit the WebPage and let upcoming Committee meetings which are aware of the benefits of being a member us know how this tool can better serve scheduled to begin at 12:45 p.m. on and selecting the Noise Control and your needs. Wednesday at the Congress. Please plan Acoustics Division as their primary Divi- I will close by saying it has been a real to attend these meetings and give your sion. We want to make the Noise Control pleasure serving as your Division Chair input for the future plans of the Division. and Acoustics Division the professional and I look forward to serving out my last If you cannot attend, feel free to contact affiliation of choice. year on the Executive Committee. The the Technical Committee Chairs and give The Executive Committee is working Division is blessed to have very talented them your ideas for possible future activi- on means to keep the Division members people serving on the Executive Commit- ties. We need your participation. better informed and provide a broader tee and as Technical Committee Chairs. A special note of thanks goes to the Divi- range of activities that may attract atten- You are strongly encouraged to get sion’s outgoing Chair, Dr. Theodore M. dance at the International Mechanical involved in the Division’s activities so Farabee for his leadership and many con- Engineering Congress and Expositions your particular interests can be served. tributions to the Division. Ted also served (IMECE). The Division uses the IMECE as Please do not hesitate to contact a mem- as Program Chair for the 1996 and 1997 its primary gathering occasion. We have a ber of the Executive Committee or a Tech- Congresses and he recently volunteered to fair degree of flexibility in what we offer nical Committee Chair to discuss items of be the webmaster for the NCAD web page. at the IMECE so if you have an idea of interest. We look forward to his continued service something that should be offered please Ted Farabee and guidance in Division affairs. share it with us.

NCAD Editor Gary H. Koopmann Assistant to Editor Penn State University Karen J. Thal 157 Hammond Building Penn State University University Park PA 16802 157 Hammond Building Tel: 814-865-2761 University Park PA 16802 Fax: 814-863-7222 Tel: 814-863-1673 email: [email protected]

2 TECHNICAL COMMITTEE NEWS

Flow Noise Modeling, CONTROL ACOUSTICS DIVISION for Call for Papers 1997. Another highlight was the award of Measurement, and a special plaque to Professor P.K. Raju Symposium on Flow-Induced Control Symposium (founding member of our committee) for Vibration and Noise of Thin Mate- Distinguished Service to the NCAD. Arials will be held at the 1999 he Flow-Induced Noise and Vibra- For the 1998 IMECE in Anaheim, CA, IMECE in Nashville, TN, November tion Committee of the Noise Con- the Materials Characterization Committee 14–19. The symposium is jointly spon- Ttrol and Acoustics Division and the is sponsoring a three session symposium sored by the Flow-Induced Vibration and Fluid Mechanics Committee of the Fluids entitled “Vibroacoustic Characterization Noise Committee of the Noise Control Engineering Division are jointly sponsor- of Advanced Materials and Structures” and Acoustics Division and the Fluid ing a Symposium on Flow Noise Model- with a total of 13 papers covering topics Mechanics Committee of the Fluids Engi- ing, Measurement, and Control on Nov- such as damage characterization and neering Division. ember 18 and 19 at the 1998 IMECE. This NDE, vibration response and damping, The symposium seeks basic and is the fourth year this symposium has and dynamic response of structures. applied research contributions in the area been offered. The intent of the Sympo- A concurrent two session workshop of flow-induced vibration and noise of sium is to bring together papers that with the theme “Recent Advances in thin materials. Topics of interest include focus on flow noise modeling, fluid-struc- Vibroacoustic Transducers and Equip- flow-induced vibration and noise of duct ture coupling in turbulent flow, measure- ment for Data Capture and Analysis” will or channel walls; sheet flutter in paper- ment techniques for quantifying flow have state-of-the-art invited lectures on making machines, printing presses, and noise characteristics, and flow noise con- topics ranging from instrumentation for air-flotation ovens; flutter and noise at trol techniques. The subject flow fields acoustic wave propagation and monitor- air-turning devices; out-of-plane dynam- that are of interest include external ing, amplified piezoelectric actuators for ics of magnetic tapes; and other types of boundary layers, turbulent flow in pipes vibration damping and new transducer flow-induced vibration and noise prob- and through piping systems, two-phase products based on micromachined silicon lems of membranes and thin plates. flows, jets, turbomachinery, flows in technologies. Authors should send three copies of an experimental facilities, and flow-structure If you are interested in knowing more abstract to one of the organizers. Final interactions that produce flow-induced or joining the committee, please contact acceptance is based on a formal review of resonances and tones. the Committee Chair, Professor Ronald F. the full paper. All papers must conform As in the three prior years, this Sympo- Gibson, Wayne State University, (tel: 313- to ASME Journal standards and will be sium has drawn an excellent collection of 577-3702, email: [email protected]) published in a bound volume. papers, which demonstrates the contin- or the Committee Vice-Chair, Professor P. Abstracts are due January 4, 1999, with ued interest in the broad topic of flow Raju Mantena, University of Mississippi preliminary acceptance January 15th. noise. It is hoped that the papers present- (tel: 601-232-5990, email: meprm@ole- Manuscripts are due March 5, 1999, with ed as part of this Symposium will be miss.edu). final acceptance April 30th and camera- informative to others and foster an P. Raju Matena ready papers due June 28, 1999. exchange of ideas on the related subjects. Organizers for the symposium are Dr. Martin Pollack, Richard Marboe, Young Bae Chang, Oklahoma State Uni- Theodore Farabee, and William Keith versity (email: [email protected]. Joint Committees to edu), Richard Marboe, Penn State Univer- Sponsor Symposium sity (email: [email protected]), Dr. Martin Pollack, Lockheed Martin (email: mlpol- Materials he Structural Acoustics Technical [email protected]), and Dr. Theodore Characterization Committee of the NCA Division will Farabee, Surface Warfare Center (email: Tjointly sponsor a special symposium [email protected]) Committee Symposium with the Applied Mechanics Division on “Innovative Computational Methods t the 1997 ASME IMECE in Dallas, Applied to Linear Structural Mechanics Texas, the committee members and Acoustics” at the 1998 ASME IMECE. organized a highly successful A This symposium will have four sessions “Inter-national Symposium on Vibroa- with a total of 15 technical papers. These coustic Methods in Processing and Char- papers will present the state-of-the-art Visit our acterization of Advanced Materials and development in structural acoustics and Structures.” Twenty papers covering top- other areas. Some topics include complex NCA Division ics from damping in composites, nonde- structures with complex internal sources structive evaluation, dynamic and impact and sub-structures, computational aeroa- response, vibration/fracture/fatigue WebPage at coustics, elastic wave resonance scatter- analysis of composites were presented in ing, acoustic holography, statistical ener- four very well attended sessions. The pro- gy analysis, energy finite element method, www.asme.org/ ceedings of the symposium were also compliant layers on elastic plates, parallel made available from ASME as a bound computation of harmonic waves, com- volume. One of our symposium papers divisions/ plex-time-step methods for transient anal- entitled “Parameter Studies in the Opti- ysis, turbulent loading function models, mal Design of Unconstrained Beam time-harmonic turbomachinery flows, noisecontrol Damping Layer Treatment” by Arnold acoustic sensors, etc. Lumsdaine and Richard Scott, was Sean F. Wu adjudged the BEST PAPER of the NOISE

3 MEMBER INTEREST SURVEY

Dear NCAD Member: F. If yes, which NCAD technical sessions A. Have you ever visited the ASME The Executive Committee of the Noise do you find most useful? Homepage? ( ) Yes, ( ) No

Control and Acoustics Division (NCAD) B. Have you ever visited the NCAD needs your feedback to assure the Divi- G. Which NCAD technical sessions do Homepage? ( ) Yes, ( ) No sion’s programs and activities best meet you find least useful? C. Which features of the NCAD Home- your needs. We ask that you take five minutes of your precious time to fill out page were most useful? our questionnaire. Please use this as an H. Do you attend the NCAD business opportunity to make your feeling known meeting at the IMECE? D. Which features of the NCAD Home- to the Division. If you would like to have ( ) Yes, ( ) No page were least useful? a follow-up communication or volunteer to work more directly with the Division, I. If you are interested in becoming more please so indicate and be sure to include involved in NCAD, circle the area of your name and appropriate contact infor- interest: planning for meetings, organiz- 6. ADDITIONAL INFORMATION mation. ing technical sessions, editing newslet- (OPTIONAL INFORMATON) ter, other: Your responses to this questionnaire A. Would you like to be contacted by the will be greatly appreciated. Division to discuss activities of possi- ble areas you would like to get 1. EMPLOYMENT PROFILE 3. JOURNAL OF ACOUSTICS AND involved in? ( ) Yes, ( ) No VIBRATION (JVA) Employer: (If yes, please complete the contact ( ) Self-employed A. Do you subscribe to the JVA? information below) ( ) Academia ( ) Yes, ( ) No B. How might the Division better support ( ) Government or, Industry (number of your needs? employees) B. If yes, do you find its articles interest- ing and informative? ( ) Yes, ( ) No ( ) <100 ( ) 100 – 1,000 ( ) >1,000 C. How many papers/year do you read C. ONE FINAL QUESTION: Overall, do Job Description: in the JVA? you find membership in the NCAD

( ) project engineer beneficial to your professional career? ( ) sales engineer ( ) Yes, ( ) No ( ) management D. How many papers/year do you pub- ( ) teaching lish in the JVA? ( ) research engineer (Optional contact information) ( ) consulting E. How many papers/year do you ( ) other review for the JVA? Name

2. NCA DIVISION PARTICIPATION Company F. If you are not already doing so, are A. From the list of Technical Commitees you willing to review papers for the Street please indicate which Committee most JVA? ( ) Yes, ( ) No closely aligns with your personal/pro- City fessional interests. You may indicate 4. NCA DIVISION NEWSLETTER more than one, but please rank them State (1, 2, 3, .etc., with 1 being highest): A. Do you read the NCAD Newsletter? ( ) Active Noise Control ( ) Yes, ( ) No Zip Code ( ) Analysis Techniques B. If so, which features do you find most Country ( ) Flow-Induced Noise & Vibration useful? ( ) Friction-Induced Sound & Vibration E-mail ( ) Materials Characterization C. Which features do you find least Tel: ( ) Instrumentation & Signal Processing useful? ( ) Structural Acoustics Fax: ( ) Turbomachinery Noise & Vibration D. Any suggestions on improving the B. Do you attend the IMECE on a yearly newsletter? Thank you for your time. basis? ( ) Yes, ( ) No C. Does your company/university/ E. Are you willing to contribute articles agency support your attendance at to the newsletter? ( ) Yes, ( ) No Please complete and return this ques- IMECE? ( ) Yes, ( ) No tionnaire to Ted Farabee by FAX (301) F. If yes, what type of articles? 227-4405 or by mail to the address D. Do you attend NCAD technical ses- sions during IMECE? provided. Alternatively, complete the ( ) Yes, ( ) No form on the Division’s WebPage 5. NCA DIVISON HOME PAGE (http:// http://www.asme.org/divisions/ E. If no, why not? www.asme.org/divisions/noisecon- noisecontrol) trol)

4 pation of young engineers in ASME and BS/MS Student the Noise Control and Acoustics Division. Any student at the undergraduate or Future Meetings of Paper Competition masters level may submit a paper pertain- the ASME Congress orrie J. Derenburger and Theodore ing to any area in the filed of acoustics. M. Kostek were first and second The final written papers and oral presen- November 14–19, 1999 tations are evaluated by a panel consist- Cplace winners in the 1997 Student Opryland Hotel Paper Competition held at last year’s ing of at least three members of the Divi- Congress in Dallas. Ms. Derenburger sion. For more information, contact Prof. Nashville TN from the Ohio State University’s Depart- Mardi Hastings at the Ohio State Univer- ment of Mechanical Engineering, won sity by phone (614) 292-2271 or e-mail: November 5–10, 2000 first place for her paper, “A comparison [email protected]. Walt Disney World Dolphin of Experimentally Determined Swimblad- der Resonances in Two Species of Fish.” Orlando FL The second place award went to Mr. Kostek from the School of Mechanical Koopmann to Give November 11–16, 2001 Engineering at Purdue University, for his Rayleigh Lecture New York Hilton & Sheraton paper, “Combining Adaptive-Passive and New York NY Fully Active Noise Control in Ducts.” he Noise Control and Acoustics Four students will be presenting papers Division is pleased to announce that November 17–22, 2002 for the competition at the 1998 Congress TDr. Gay H. Koopmann will give the in Anaheim. In addition to cash awards Rayleigh Lecture at the 1998 Interna- New Orleans Hilton & for the first and second place papers, each tionl Mechanical Engineering Congress Ernest Morial Convention participant will also receive $300 to help and Exposition in Anaheim. The lecture cover travel expenses. “Designing Quiet Structures - Virtually” Center The BS/MS Student Paper Competition will be presented on Thursday, Novem- New Orleans LA was initiated in 1993 to promote partici- ber 19, beginning at 3:45 PM.

Serve the Engineering Community Earn Discounts on Society Products and Services Gain a Chance to Win an Array of Prizes

5 NCAD ORGANIZATION 1998 – 1999

ENVIRONMENT & TRANSPORTATION LIAISON CHAIRMAN OPERATING BOARD INCE- Rich Peppin VP: Henry A. Scarton 518-276-6728 301-495-7738 ASME Staff GOV’T- Adnan Akay Elio Manes NCAD REPS: NCAD CHAIR & VICE CHAIR 412-268-2501 212-591-7797 Mardi Hastings 614-292-2271 C&STDS- Henry Scarton Alan Pierce 617-353-4841 518-276-6728 SAE- Bob Bernard PROG REP: 317-494-2141 Sean Wu 313-577-3884 ASA- Ted Farabee 301-227-1731 AIAA- Al Hersh 818-998-8311

CHAIR M. Hastings 614-292-2271

SEC/TR Member PRG CHAIR Vice Chair Member Niranjan Humbad Gary H. Koopman Sean Wu Alan D. Pierce Martin Pollack 313-323-8243 814-865-2761 313-577-3884 617-353-4841

INTERNAL COMM CHAIR

Codes & Standards H. Scarton 518-276-6728 Member JVA Associate Editor Government Relations A. Akay 412-268-2501 Honors & Awards M. Sevik 202-227-1334 NCAD Newsletter Editor Membership Development G. Koopmann P. K. Raju 334-844-3301 814-865-2761 Per Bruel Award A. Pierce 617-353-4841

TECHNICAL COMMITTEES

Active Noise Control Analysis Techniques Flow Ind. Vib. & Noise

Chair: G. Koopmann Chair: A. Pierce Chair: R. Marboe 814-865-2761 617-353-4841 814-863-3019

Friction-Induced Material Sound & Vibration Characterization Chair: M. Ozbek Chair: R. Gibson 206-238-9132 810-356-5458

Instrumentation and Structural Acoustics Turbomachinery Signal Processing Noise & Vibration Chair: M. Hastings Chair: S. Wu Chair: N. Humbad 614-292-2271 313-577-3884 313-323-8243

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