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The Stage Is Set
The Stage Is Set: Developments before 1900 Leading to Practical Wireless Communication Darrel T. Emerson National Radio Astronomy Observatory1, 949 N. Cherry Avenue, Tucson, AZ 85721 In 1909, Guglielmo Marconi and Carl Ferdinand Braun were awarded the Nobel Prize in Physics "in recognition of their contributions to the development of wireless telegraphy." In the Nobel Prize Presentation Speech by the President of the Royal Swedish Academy of Sciences [1], tribute was first paid to the earlier theorists and experimentalists. “It was Faraday with his unique penetrating power of mind, who first suspected a close connection between the phenomena of light and electricity, and it was Maxwell who transformed his bold concepts and thoughts into mathematical language, and finally, it was Hertz who through his classical experiments showed that the new ideas as to the nature of electricity and light had a real basis in fact.” These and many other scientists set the stage for the rapid development of wireless communication starting in the last decade of the 19th century. I. INTRODUCTION A key factor in the development of wireless communication, as opposed to pure research into the science of electromagnetic waves and phenomena, was simply the motivation to make it work. More than anyone else, Marconi was to provide that. However, for the possibility of wireless communication to be treated as a serious possibility in the first place and for it to be able to develop, there had to be an adequate theoretical and technological background. Electromagnetic theory, itself based on earlier experiment and theory, had to be sufficiently developed that 1. -
Electrophonic Musical Instruments
G10H CPC COOPERATIVE PATENT CLASSIFICATION G PHYSICS (NOTES omitted) INSTRUMENTS G10 MUSICAL INSTRUMENTS; ACOUSTICS (NOTES omitted) G10H ELECTROPHONIC MUSICAL INSTRUMENTS (electronic circuits in general H03) NOTE This subclass covers musical instruments in which individual notes are constituted as electric oscillations under the control of a performer and the oscillations are converted to sound-vibrations by a loud-speaker or equivalent instrument. WARNING In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. 1/00 Details of electrophonic musical instruments 1/053 . during execution only {(voice controlled (keyboards applicable also to other musical instruments G10H 5/005)} instruments G10B, G10C; arrangements for producing 1/0535 . {by switches incorporating a mechanical a reverberation or echo sound G10K 15/08) vibrator, the envelope of the mechanical 1/0008 . {Associated control or indicating means (teaching vibration being used as modulating signal} of music per se G09B 15/00)} 1/055 . by switches with variable impedance 1/0016 . {Means for indicating which keys, frets or strings elements are to be actuated, e.g. using lights or leds} 1/0551 . {using variable capacitors} 1/0025 . {Automatic or semi-automatic music 1/0553 . {using optical or light-responsive means} composition, e.g. producing random music, 1/0555 . {using magnetic or electromagnetic applying rules from music theory or modifying a means} musical piece (automatically producing a series of 1/0556 . {using piezo-electric means} tones G10H 1/26)} 1/0558 . {using variable resistors} 1/0033 . {Recording/reproducing or transmission of 1/057 . by envelope-forming circuits music for electrophonic musical instruments (of 1/0575 . -
Alexander Graham Bell 1847-1922
NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA BIOGRAPHICAL MEMOIRS VOLUME XXIII FIRST MEMOIR BIOGRAPHICAL MEMOIR OF ALEXANDER GRAHAM BELL 1847-1922 BY HAROLD S. OSBORNE PRESENTED TO THE ACADEMY AT THE ANNUAL MEETING, 1943 It was the intention that this Biographical Memoir would be written jointly by the present author and the late Dr. Bancroft Gherardi. The scope of the memoir and plan of work were laid out in cooperation with him, but Dr. Gherardi's untimely death prevented the proposed collaboration in writing the text. The author expresses his appreciation also of the help of members of the Bell family, particularly Dr. Gilbert Grosvenor, and of Mr. R. T. Barrett and Mr. A. M. Dowling of the American Telephone & Telegraph Company staff. The courtesy of these gentlemen has included, in addition to other help, making available to the author historic documents relating to the life of Alexander Graham Bell in the files of the National Geographic Society and in the Historical Museum of the American Telephone and Telegraph Company. ALEXANDER GRAHAM BELL 1847-1922 BY HAROLD S. OSBORNE Alexander Graham Bell—teacher, scientist, inventor, gentle- man—was one whose life was devoted to the benefit of mankind with unusual success. Known throughout the world as the inventor of the telephone, he made also other inventions and scientific discoveries of first importance, greatly advanced the methods and practices for teaching the deaf and came to be admired and loved throughout the world for his accuracy of thought and expression, his rigid code of honor, punctilious courtesy, and unfailing generosity in helping others. -
Perfect Pitch and Pitch Standardization
Ian Watson Qualitative Research Methods Department of Sociology Rutgers University Spring 2000 PITCH STANDARDIZATION AND PERFECT PITCH This is really two studies in one. The first is a discussion of the social process of pitch standardization. Nature gives us a smooth continuum of audible sound frequencies on which there are an infinite number of points. But the frequencies of the pitches we actually hear every day cluster around just a few socially conventional points. The first part of this paper tries to explain how and why that happens. It differs from other accounts of pitch standardization (such as Lloyd 1954) in that it tries to show how pitch standardization is just one of many kinds of social coordination, and that all these sorts of coordination share abstract features in common. The second part of this study is a report of six interviews with people who have perfect pitch (also called absolute pitch). Perfect pitch is, among other things, the ability to hear a musical note and then instantly give the name of its pitch. This part of the study is, on the one hand, simply an ethnographic report of the things I learned during six relatively open-ended short interviews with people who have perfect pitch. However, it is my conviction that one cannot come to a full understanding of perfect pitch without a full understanding of pitch standardization. In this sense the first part of the study is simply a preliminary to the second part. Indeed, I propose the thesis that no one would be able to develop perfect pitch if the pitches they hear around them were not distributed categorically, in clusters around a 1 few dozen socially conventional focal points. -
Compendium of Quality Musical Instruments Compiled by Myron Peterson, Urbandale High School Thanks to All Contributors Noted Below
Compendium of Quality Musical Instruments Compiled by Myron Peterson, Urbandale High School Thanks to all contributors noted below. Flute Good Better Best Yamaha 362 Yamaha 462 Pearl 765 Pearl 665 Miyazawa 102 Miyazawa 402 Trevor James Cantabile Miyazawa 202 Piccolo Good Better Best Yamaha YPC32 Yamaha YPC-62 Keefe Any model Yamaha YPC-81, 82 Hammig Any model Emerson Boston Legacy Hammig 650/2 or 3 Merchants: Rieman's Music Uptempo Music West Music, Coralville, IA Woodwind Brasswind Miyazawa Flutes Hammig Piccolos Contributors Margaret Kegel Amy Sams Compendium of Quality Musical Instruments Compiled by Myron Peterson, Urbandale High School Thanks to all contributors noted below. Oboe Good Better Best Fox Renard 300 Fox Renard 330, 330 Protégé Yamaha TOB-831 or 841 Fox 450 Loree Royal Rigoutat Rlec Fossati Howarth Bassoon Good Better Best Fox Renard 222 Fox Renard 220 Merchants: Rieman's Music Uptempo Music Woodwind Brasswind Midwest Musical Importswww.mmimports.com/index.html Contributors Leslie Fleer Jade Fox Cassidy Noring Melanie Spohnheimer Compendium of Quality Musical Instruments Compiled by Myron Peterson, Urbandale High School Thanks to all contributors noted below. Clarinet (B-Flat) Good Better Best Selmer CL211 Buffet Crampon E11 / E13 Buffet Crampon R13 Yamaha 450 Series YCL450N Yamaha CSVR Selmer Paris Signature B16(followed by any combination of Mouthpieces letters / numbers) Better Best Hite Premiere Vandoren M15 or Vandoren M30 Fobes Debut Fobes San Francisco Series (many options here) Vandoren B45 Bass Clarinet (B-flat) -
Overview of ITU's History
Overview of ITU’s History For a century and a half since 1865, the International Telecommunication Union (ITU) has been at the centre of advances in communications -- from telegraphy through to the modern world of satellites, mobile phones and the Internet. The story of ITU is one of international cooperation, among governments, private companies and other stakeholders. The continuing mission is to achieve the best practical solutions for integrating new technologies as they develop, and to spread their benefits to all. From telegraph to telephone For thousands of years, the quickest method of sending complex messages over long distances was with a courier on horseback. At the end of the 18th century, Claude Chappe inaugurated a network of visual semaphore stations across France. Then came the electrical revolution. Experiments were conducted in sending electric signals along wires, and in 1839, the world’s first commercial telegraph service opened in London with a system created by Charles Wheatstone. In the United States, Samuel Morse used the new Morse code to send his first telegraph message in 1844. Already in 1843, a precursor of the fax machine for transmitting images had been patented in the United Kingdom by Alexander Bain. Telegraph wires soon linked major towns in many countries. A submarine telegraph wire (coated in protective gutta percha) was laid between Britain and France in 1850, and a regular service inaugurated the following year. In 1858, the first transatlantic telegraph cable was laid. But there was a problem. Where lines crossed national borders, messages had to be stopped and translated into the particular system of the next jurisdiction. -
TC 1-19.30 Percussion Techniques
TC 1-19.30 Percussion Techniques JULY 2018 DISTRIBUTION RESTRICTION: Approved for public release: distribution is unlimited. Headquarters, Department of the Army This publication is available at the Army Publishing Directorate site (https://armypubs.army.mil), and the Central Army Registry site (https://atiam.train.army.mil/catalog/dashboard) *TC 1-19.30 (TC 12-43) Training Circular Headquarters No. 1-19.30 Department of the Army Washington, DC, 25 July 2018 Percussion Techniques Contents Page PREFACE................................................................................................................... vii INTRODUCTION ......................................................................................................... xi Chapter 1 BASIC PRINCIPLES OF PERCUSSION PLAYING ................................................. 1-1 History ........................................................................................................................ 1-1 Definitions .................................................................................................................. 1-1 Total Percussionist .................................................................................................... 1-1 General Rules for Percussion Performance .............................................................. 1-2 Chapter 2 SNARE DRUM .......................................................................................................... 2-1 Snare Drum: Physical Composition and Construction ............................................. -
A Contemporary Study of Musical Arts Informed by African Indigenous Knowledge Systems
A CONTEMPORARY STUDY OF MUSICAL ARTS INFORMED BY AFRICAN INDIGENOUS KNOWLEDGE SYSTEMS VOLUME 1 THE ROOT – FOUNDATION Meki Nzewi Ciimda series A contemporary study of musical arts informed by African indigenous knowledge systems Volume 1 Author: Meki Nzewi Music typesetting & illustrations: Odyke Nzewi Reviewer and editor: Christopher Walton Copy editor: Hester Honey Music instrument illustrations: Themba Simabine Proofreading: Chérie M. Vermaak Book design and typesetting: Janco Yspeert ISBN 978-1-920051-62-4 © 2007 Centre for Indigenous Instrumental African Music and Dance (Ciimda) First edition, first impression All rights reserved Production management: Compress www.compress.co.za CONTENTS INTRODUCTION vii MODULE 101: MUSICAL STRUCTURE AND FORM 1 UNIT 1 – REVIEW OF THE ELEMENTS OF MUSIC WRITING 3 TOPIC 1 Symbols for writing music 3 TOPIC 2 Graphic representation of pitches 6 TOPIC 3 Identifying and writing intervals or steps 9 TOPIC 4 Measurement of musical time 16 UNIT 2 – COMPONENTS, STRUCTURE AND FORM OF A MELODY 20 TOPIC 1 Aural and visual features of a melody 20 TOPIC 2 The structure of a melody 21 UNIT 3 – TONE/PITCH ORDER, SCALE SYSTEM AND KEYS 31 TOPIC 1 Tone order 31 TOPIC 2 Scale system 33 TOPIC 3 Keys 34 MODULE 102: FACTORS OF MUSIC APPRECIATION 47 UNIT 1 – FACTORS OF MUSIC-KNOWING AND MUSIC APPRECIATION IN INDIGENOUS AFRICAN CULTURES 49 TOPIC 1 Pulse in African music 49 TOPIC 2 Music and dance relationship in African musical arts 51 TOPIC 3 Cultural sonic preferences 52 TOPIC 4 Cultural rhythm 52 TOPIC 5 Psychical tolerance -
On the Notation and Performance Practice of Extended Just Intonation
On Ben Johnston’s Notation and the Performance Practice of Extended Just Intonation by Marc Sabat 1. Introduction: Two Different E’s Like the metric system, the modern tempered tuning which divides an octave into 12 equal but irrational proportions was a product of a time obsessed with industrial standardization and mass production. In Schönberg’s words: a reduction of natural relations to manageable ones. Its ubiquity in Western musical thinking, epitomized by the pianos which were once present in every home, and transferred by default to fixed-pitch percussion, modern organs and synthesizers, belies its own history as well as everyday musical experience. As a young musician, I studied composition, piano and violin. Early on, I began to learn about musical intervals, the sound of two tones in relation to each other. Without any technical intervention other than a pitch-pipe, I learned to tune my open strings to the notes G - D - A - E by playing two notes at once, listening carefully to eliminate beating between overtone-unisons and seeking a stable, resonant sound-pattern called a “perfect fifth”. At the time, I did not know or need to know that this consonance was the result of a simple mathematical relationship, that the lower string was vibrating twice for every three vibrations of the upper one. However, when I began to learn about placing my fingers on the strings to tune other pitches, the difficulties began. To find the lower E which lies one whole step above the D string, I needed to place my first finger down. -
EAR TRAINING SUGGESTIONS for USING the CHROMATIC PITCH PIPE by Jamey Aebersold
EAR TRAINING SUGGESTIONS FOR USING THE CHROMATIC PITCH PIPE By Jamey Aebersold Jamey Aebersold Jazz® offers The “Pocket Tones” Electronic Pitch Pipe. The following information will help you get the most out of it. .................................................................................................................................................................................. EXERCISES The following are just a few of the many exercises available. As you try some of these, I’m sure others will come to mind. 1. Play any tone. With that tone in mind, make it the root/tonic/first note of any scale. Sing the scale up, then down, then check to see that you ended on the note you began. You can do this with triads (major, minor, diminished, augmented); the chromatic scale; short melodies (such as Twinkle, Twinkle Little Star, Happy Birthday, or Ole Man River); the first three to give notes of any scale; or just sing an interval such as a perfect 4th (the first two notes of Here Comes The Bride). Constantly check your pitch with the pitch pipe to see if you are straying from the original starting tone. I find it best to sing out loud so I can hear myself. If you seem to be having trouble, slow the exercise down or try fewer notes. 2. Pick out a note from anything you hear. It cold be from the radio, CDs, TV, cassettes or even just a tone from your mind. After thinking about it for a few seconds, blow any tone on the pitch pipe. If it doesn’t match the original tone, try to figure out how far away it is and label (name) the distance (the interval) in your mind. -
Organ Building in Germany During
This dissertation has been microfilmed exactly as received 67-6327 JACKISCH, Frederick Frank, 1922- ORGAN BUILDING IN GERMANY DURING THE BAROQUE ERA ACCORDING TO THE TREATISES DATING FROM PRAETORIUS’ SYNTAGMA MUSICUM (1619) TO ADLUNG’S MUSICA MECHANICA ORGANOEDI (1768). The Ohio State University, Ph.D., 1966 Music University Microfilms, Inc., Ann Arbor, Michigan ORGAN BUILDING IN GERMANY DURING THE BAROQUE ERA ACCORDING TO THE TREATISES DATING FROM PRAETORIUS' SYNTAGMA MUSICUM (I619) TO ADLUNG'S MUSICA MECHANICA ORGANOEDI (1?68) DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Frederick Frank Jackisch, B.S. Ed., M. Mus ****** The Ohio State University 1966 Approved by Advise] Department of Music ORGAN BUILDING IN GERMANY DURING THE BAROQUE ERA ACCORDING TO THE TREATISES DATING FROM PRAETORIUS' SYNTAGMA MUSICUM (l6l9) TO ADLUNG'S MUSICA MECHANICA ORGANOEDI (1768) By Frederick Frank Jackisch, Ph.D. The Ohio State University, I966 Dr. Herbert Livingston, Adviser In recent years a number of important studies of extant Baroque organs have been made in an effort to gain a fuller understanding of those instruments. Although most of these organs have long since undergone numerous alterations, they nevertheless disclose much of the world of the organ builders of that past age. Such disclosures, however, form only a part of what may be learned of Baroque organ build ing. The processes, the concepts, the ideas, and ideals which led ultimately to the finished product may be known more fully by an examination of the contemporaneous treatises on organ building. -
Private Telegraphy
Private telegraphy: The path from private wires to subscriber lines in Victorian Britain Jean-François Fava-Verde Submitted in accordance with the requirements for the degree of Doctor of Philosophy The University of Leeds School of Philosophy, Religion and History of Science September 2016 ii The candidate confirms that the work submitted is his own and that appropriate credit has been given where reference has been made to the work of others. This copy has been supplied on the understanding that it is copyright material and that no quotation from the thesis may be published without proper acknowledgement © 2016 The University of Leeds and Jean-François Fava-Verde The right of Jean-François Fava-Verde to be identified as Author of this work has been asserted by him in accordance with the Copyright, Designs and Patents Act 1988. iii Acknowledgements In the first place, I would like to thank my supervisor, Professor Graeme Gooday, for his guidance and encouragement during the production of this thesis. I enjoyed our frank discussions and I am especially grateful to him for sharing his insight into the history of technology. My sincere thanks also to my examiners, Dr Jonathan Topham and Dr Ben Marsden, for their constructive comments on my thesis. It has also been a privilege to work alongside the knowledgeable and friendly members of the telecommunications reading group of the department, especially Dr Michael Kay, Dr John Moyle, and Dr Lee Macdonald, who broadened my vision and provided insights into various themes such as private telephony, telegraphic lines testing or the effect of solar disturbance on telegraphic lines.