The Audio Engineering Society
JOURNAL OF THE AUDIO ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-president Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer BOARD OF GOVERNORS George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robimson John E. Volkmann VOLUME 20 NUMBER 1 ARTICLES Chromium Dioxide Audio Cassette Tape 2 Leland K. Jordan, Robert J. Kerr, and John Dickens SCORE-A Musician's Approach to Computer n4usic . . . . . . . . Leland Smith 7 Phase-Shift Characteristics of Record Cutters and Pickups Daniel W. Graverea x, Arthur J. Gust, and Benjamin B. Bauer 15 Comparative Stereophonic Listening Tests . . . . . . . . . . . . . . . . . . . . Carl Ceoen 19 Simplified Loudspeaker Measurements at Low Frequencies . Richard H. Small 28 Room Acoustics of Studios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ranger Farrell 34 . PROJECT NOTES/ENGINEERING BRIEFS COMMITTEE CHAIRMEN . . . . . . . . . . . . . . . . . . . . . . . James . . . . . . . . . . . . . Ludwig B. Wood De Kesel 37 4i Rms Power: Fact or Fancy . . . . . . . . . . . . . John M. Earple and Bart Locanthi Comments on "What's a Watt (rms)?" (J. Robert Ashley, JAES 19, 9 (1971)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Soundproofing-An Important Security Factor . . . . . . . . . . Thomas W. Wathen 45 A Stereo Program Phase Checker Telephone Repeater Circuits for Studia Use M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodurard Executive Committee J. Harvey Exhibits A. E. Gruber Finance J. D. Colvin Historical W.L. Robinson Laws & Resolutions W. H. Freitag Library C. R. Anderson Membership G. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections 3. G. McKnight Standards R. T. Bozak Sustaining Memberships FV. H. Freitag Tellers SECTIONS 46 47 DEPARTMENTS Standards . . . . . . . . . . . . . . . . . . . . Review of Acoustical Patents . . . Sound Track . . . . . . . . . . . . . . . . . News of the Sections . . . . . . . . . . 48 53 60 64 Available Literature . . . . . . . . . . . Shopping the Audio Market . . . . Membership Information . . . . . . . Obituaries . . . . . . . . . . . . . . . . . . . 68 72 76 80 EDITORIAL BOARD British Canada Central Europe Japan Los Angeles Midwest New York San Francisco Washington . LETTERS TO THE EDITOR . ADMINISTRATION Dorothy H. Spronck Administrative Secretary J. R. Ashley D. M. Black D. H. Cooper J. M. Eargle E. J. Foster M. B. Gardner R. C. Heyser J. M. Hollywood P. Kantrowitz E. L. Kent D. L. Klepper J. H. Kogen D. S. McCoy J. G. McKnight R. A. Moog A. R. Morgan J. T. Mullin R. E. Owen A. P. G. Peterson M. R. Schroeder C. F. Swisher E. L. Torick D. R. von Recklinghausen J. G. Woodward Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. Stochmal Copy Editor Harry F. Olson Editor Emeritus SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y.10017, Membership information and back copies may be obtained from either office. 1- Journal of the Audio Engineering Society. Volume 20 No. 1 January/February 1972 Published monthly except January/February and July/August 'when 'published bi-monthly b y ' t h e Audio Engineering Society and supplied to a l l members in good standing. Publication Affice, 124 East 40th Street New York N.Y. 10016. Executive office Room 929 Lincoln Building, 60 East 42nd d N.YI 10017. Second class postage paid a t N'ew York N.Y. a n d at additional Street, e York m a l i n goffices. h b s c r i t i oton nonmembers, 30.00 per year. copyright91972 by the Audio Engineering Society. The Journal is indexed in t h e Applied Science & Technology Index. The Journal of the Audio Engineering Society hereby grants permission t o reprint i n part, a n y paper i n this issue i f direct permission i s obtained f r o m its author(s) and credit i s given t o t h e author(s) and this journal. An author, o r his research affiliate m a y reproduce his paper i n f u l l crediting this journal. This permission is not assignable. The "Journal of t h e Audio Engineering Society" and i t s cover design has been registered as a trademark i n t h e United States Patent Office.
JOURNAL OF T H E AUDIO ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastein Vice-President C. Roger Anderson Central Vice-President Leon A. Woatman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer BOARD OF GOVERNORS George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robinson John E. Volkmann ARTICLES The Effects of Transit Time and Intensity Differentials Upon Recreating Acoustic Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Edward M. Long 82 . . . . . . . . . . . . . . . . . . . . . . . . . . Eric D. Daniel 92 The Fringing Response of Magnetic Reproducers at Long Wavelengths I. G. hlcKnight 100 The Influence of a Single Echo on the Audibility of Speech . . . . . Helmut Haas 145 UHF Radio Link for Transmission of High-Quality Stereophonic Programs Matti Otala and Ernst v. Knorring 106 The Advantage and Disadvantage of Hearing Aids in Industry Alex 1. Szecsody 109 LETTERS TO THE EDITOR Condenser Microphone Calibration and Response in Deep Diving Esrvironments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W. W. Mullen, Jr. The Strobophone . L. A. Geddes, J. D. Bourland, and T. W. Coulter 112 115 DEPARTMENTS Review of Acoustical Patents . . . . 118 Sound Track . . . . . . . . . . . . . . . . . 124 Ne%s of the Sections . . . . . . . . . . 128 Shopping the Audio Market . . . . . 132 Available Literature . . . . . . . . . . . 136 Membership Information . . . . . . . 130 EDITORIAL BOARD SECT! ONS J. R. Ashley D. M. Black D. 3.Cooper J. M. Eargle E. J. Foster M. B. Gardner British Canada Central Europe Japan Los Angeles Midwest New York San Francisco Washington . MARCH 1972 PROJECT NOTES / ENGINEERING BRIEFS hl. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits A. E. Grnber Finance J. D. Colvin Historical W. L. Robinson Laws & Resolutions W. I%.Freitag Library C. R. Anderson Membership 6. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards R. T. Bozak Sustaining Memberships W. H. Freitag Tellers - NUMBER 2 Tape Noise in Audio Recording COMMITTEE CHAIRMEN . . VOLUME 20 . R. C. Heyser J. M. Hollywood P. Kantrowitz E. L. Kent D. L. Klepper J. H. Kogen D. S. McCoy J. G. McKnight R. A. Moog A. R. Morgan J. T. Mullin R. E. Owen A. P. G. Peterson M. R. Schroeder C. F. Swisher E. L. Torick D. R. von Recklinghaurea J. G. Woodward ADMINISTRATION Robert 0. Fehr Editor Jacqueline Harvey Mariasing Editor Evelyn A. Morris Production Editor Ingeborg M. Stochmal Copy Editor Harry F. Olson Editor Emeritus Dorothy H. Spronck Administrative Secretary SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office. 1- Journal of the Audio Engineering Societv. Volume 20. No. 2. March 1972. P i b l i q h mnnthlv ri except J a n u a r y / e b r u a r y a n dJUI;/AU U& when published bil;nonthly: by the u d i o n i n & ; i n k Society and supplied t o all members in good standing, Publication office, 124 East 40th Street New York, N.Y. 10016. Executive office, Room 929. Lincoln Building, 60 East 42nd Street, e d York. N.Y. 10017. Second class Dostaae aid a t New York. N.Y. and at additional mailing offices. Subscription to nonmembers, 30.00 p e i year. Copyright 1972 by t h e u d i o n g i n e e r i n g o c i e t y ; The Journal is indexed in the Applied Science & Technology Index. The Journal of the Audio Engineering Society hereby grants permission to reprinl i n part, any paper i n this issue i f direct permission is obtained from its author(s) and credit is given to the author(s) and this journal. An author, o r his research affiliate may reproduce his paper i n full crediting this iournal. This oermission is not assienable The " 6 u r n a l ' o f the u d i d n ineering and-its cover design has been registered as a trademark i n the United States Patent Office.
5 AUDIO ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plrrnkett Secretary Arthur E. Gruber Treasurer VOLUME 20 APRIL 1972 NUMBER 3 ARTICLES A Practical High-Frequency Trackability Test for PI onoPickrips C. Roger Anderson and Paul W. Jellrick 162 George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L,. Ooms William L. Robinson John E. Volkmann Proposed Universal Encoding Standards for Compatible Your-Channel Matrixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K. Xtoh 167 COMMITTEE CHAIRMEN Design Room or Sound System? B. Davis 208 M. Camras Admissions F. V. Hunt Awards L. A. Wortulan 42nd Convention D. W. Poners 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits 4. E. Gniber Finance J. D. Colvin I-fistorical W. L. Robins011 Laws & Resolutio ls W. H. Freitag Library C. R. Anderson Membership G. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards R. T. Bozak Sustaining Memberships W. H. Freitag Tellers EXarmonic Structure of PN Sequcnccs . . . . . . . . . . . . . . . . . Ralph N7.Brrrhans 210 SECTIONS J. R. Ashley D. M. Black D. H. Cooper J. M. Eargle E. J. Foster M. B. Gardner BOARD OF GOVERNORS . Pseudo-Noise Timbre Generators . . . . . . . . . . . . . . . . . . . . . Ralph W. Bui-l ans 174 Acolistical Circ iitsRevisited . . . . . . . . . . . . . . . . . . . . - . 185 198 PROJECT NOTES / ENGINEERING BRIEFS British Canada Central Europe Japan Los Augeles Midwest New York San Francisco Washington . Robert Charles Howard Aconstical and Electroacoortical Arrangen ent for the Dynamically Fucnsed Room . . . . . . . . . . . . . . . . . . . . . . . . . Fritz W. Winckel and Manfred Kraose . ADMINISTRATION Dorothy H. Sprunck Administrative Secretary . . . . . . . . . . . . . . . . . . . . . . . . Donald LETTERS TO THE EDITOR Comments on "Groove Fxho in Lacquer Masters" (D. W. Gravereaux and B. R. Bauer, JAES 19, 10 (1971)) . . . D. A. Barlow 214 Reply to "Comments on 'Groove Echo in Lacquer Masters''' (11 A. Barlow. JAES 20, 3 (1972)) . . . . D. W. Graverea rxand H. B. Rauer 216 Power Specification Conversion Factors . . . . . . . . . . . . . . . . . . . . T. A. Saponas 218 DEPARTMENTS Review of Acoustical Patents . . . . 220 Exhibits Previews for 42nd Convention . . . . . . . . . . . . . . . . . 225 Newa of the Sections . . . . . . . . . . 242 Sound 'Track . . . . . . . . . . . . . . . . . 246 Menlbel-ship Information . . . . . . . 250 EDITORIAL BOARD R. C. Heyser J. M. Hollywood P. Kantrowitz E. L. Kent D. L. Klepper J. H. Kogen D. S. McCoy J. G. McKnight R. A. Moog A. R. Morgan J. T. Mullin R. E. Owen A. P. G. Peterson M. R. Schroeder C. F. Swisher E. L. Torick D. R. von Recklinghausen J. G. Woodward Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor lngeborg M. Stochn alCopy Editor Harry F. Olson Editor Emeritus SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Soc ety,Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membersh pinformation and back copies may be obtained Prom either office. -C Y J o u r n a l o f t h e Audio Engineering Society. V o l u m e 20, No. 3 April, 1972. Published rnonthly except January/February a n d J u l y / A u g u s t w h e n published b i - n i o n t h l y b y t h e Audlo Engineering Society a n d supplied t o a l l m e n l b e l s i n g o o d stalrdirlg. Publicatioil oifice 124 East 401h Street N e w York, N.Y. 10016. Executive office, R o o m 929, Lincoln Building. 60 k a s t 4 2 n d Street, N& York N.Y. 10017. Second class postage p a i d a t New York N.Y. and a t a d d t o n a mla i l i n g offices. u b L c r i p t i o nt o nonmembers, 30.00 p e r year. Copyright i972 b y t h e Audio Engineering Society., 1he J o u r n a l i s n d e x e di n t h e Applied Science & Technology Index. T h e J o u r n a l of t h e Audio Engineering Society hereby gl-ants p e r n i s s i o nt o r e p r i n t i n part, a n y paper i n t h i s issue i f d r e c tpermission i s obtained f r o m t s author(s) a n d credit is givcn t o t h e author(s1 a n d t h i s journal. An author, o r h i s research affiliate m a y reproduce h i s paper i n f l l l c r e d i t i n g t h i s journal. This perrrltssion is n o t assignable. The "Journal of t h e Audio Engineering Society" and its cover design h a s been r e g i s t e e das a t r a d e m a r k i n t h e United States Patent Oflice.
J O U R N A L OF THE AUDIO ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer BOARD OF GOVERNORS George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robinson John E. Volkmann The Effect of Conducting Gap Spacers on the Impedance of Magnetic Heads Rudolf Otto 258 Mechanical Playback Losses and the Design of Wideband Phonograph Pickups James V. White 265 A Clinical Study to Evaluate Rock Music, Symphonic Music and Noise as Sources of Acoustic Trauma . . . . . . . . . John P. Barry and Ian B. Thomas 271 Large-Scale Integration in Organ Design . . . . . . . . . . . . . Ray B. Schrecongost 275 An Ultraminiature Console Compression System with Maximum User Flexibility . Barry Blesser 297 LETTERS TO THE EDITOR . British Canada Central Europe Japan Los Angeles Midwest New York San Francisco Washington - ARTICLES . . . . . . . . . . . . . . . . . G. K. Thurnlond 282 Record-Changer Design Considerations of Today . . . . . . Robert J. Hammond 290 M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits A. E. Gruber Finance J. D. Colvin Historical W. L. Robinson Laws & Resolutions W. H. Freitag Library C. R. Anderson Membership G. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards R. T. Bozak Sustaining Memberships W. H. Freitag Tellers . MAY 1972 NUMBER 4 A Complex Sound System Equalization COMMITTEE CHAIRMEN SECTIONS VOLUME 20 . ADMINISTRATION Dorothy H. Spronck Administrative Secretary Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Eng neering Society Journal, 124 East 40th Street, New York 10016. Address all other Society busmess to the A u d oEngineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office. 'pU, Comments o n "Sound Columns-Practical Design and Applications" (L. H. Schaudinischky, A. Schwartz, and S. T. Mashiah, JAES 19, 1 (1971)) W. A. M. Ramsbotham 303 Reply to "Comments on 'Sound Columns-Practical Design and Applications"' (W. A. M. Ramsbotham. JAES 20, 4 (1972)) . . . . . . . . . . . . . . . . S. Mashiah 303 Comments on "Electrical Design and Musical Applications of an Unconditionally Stable Cornbination Voltage Controlled Filter/Resonator" (D. P. Colin, JAES 19, 11 (1971)) . . . . . . . . . . . . . . . . . . J. Robert Ashley 304 Keply to " C o n n r non t s 'Electrical Ilrsign :tud hlllhicill , \ p p l i w t i of a11 s 1.'11ronditior allvStihle C'o r l)i ratio r \'olt; reControlled I2ilter/Reso rntor'" (J. o b e r Ashley, i JAES 20, 4 (1972fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304 DEPARTMENTS AES Encore in Europe . . . . . . . . 306 Complete Convention Program . . 3 18 Standards . . . . . . . . . . . . . . . . . . . . 326 News of the Sections . . . . . . . . . . 330 Obituaries P. Kantrowitz E. L. Kent D. L. Klepper P. W. Klipsch J. H. Kogen Ivlembership Information 344 . 339 . EDITORIAL BOARD J. R. Ashley J. RI. Hollywood D. H. Cooper J. M. Eargle E. J. Foster M. B. Gardner R. C. Heyser Shopping the Audio Market . . . . 332 Available Literature . . . . . . . . . . . 335 Sound Track . . . . . . . . . . . . . . . . . 337 D. S. McCoy J. G. McKnight R. A. Moog J. T. Mullin R. E. Owen A. P. G. Peterson M. R. Schroeder C. F. Swisher I. B. Thomas E. L. Torick D. R. von Recklinghausen J. G. Woodward Robert 0. Fehr Editor Jacqueline t1:lrvey Managing Editor Ingeborg M. Stoclrmal Copy Editor Evelyn A. Morris Production Editor Harry F. Olson Editor Emeritus J o u r n a l o f t h e Audio Engineering Society, Volume 20. No. 4, M a y 1972. Published m o n t h l y except January/February a n d July/August when published bi-monthl;, b y t h e Audio Engineering Society and r u p p l i e d t o a l l m e m b e r s i n good standing. Publication o f f c e .124 East 40th Street New York, N.Y. 10016. Executive office, Room 9 2 9 , L n c o l nBuilding, 60 East 42nd Street, e York, N.Y. 10017, Second class postage paid a t New York, N.Y. a n d a t additional m a i l i n g offices. Subscription t o nonmembers, 30.00 ner year. Copyright 1972 by t h e Audio E n g n e e r i n gSociety. The Journal is indexed i n t h e Applied Science & T e c h n o l o g y Index. The Journal of t h e Audio Engineering Society hereby g r a n t s permission t o reprint i n p a r t , a n y paper i n t h i s issue i f d i r e c t permission is obtained f r o m i t s author(s) a n d credit is given t o t h e author(s) and t h i s journal. An author, o r h i s research affiliate m a y reproduce his paper in f u l l c r e d i t i n g t h i s journal. T h i s permission is n o t assignable. The "Journal of t h e A u d i o Engineering Society" and i t s cover design h a s beerr registered as a t r a d e m a r k i n t h e U n i t e d States Patent Office. d
JOURNAL OF THE AUDO I ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer VOLUME 20 NUMBER 5 JUNE 1972 ARTICLES BOARD OF GOVERNORS George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robinson John E. Volkmann Discrete-Matrix Multichannel Stereo . . . . Duane H. Cooper and Takeo Shiga 346 Further Improvements in Discrete Four-Channel Disc System C D - I Isao Owaki, Teruo hlulaoka and 'roshiya Inoue 361 Laboratory Measurement of Howlback Probability in Speech-Reinforcement Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Daniel Queen 370 Tempered Scale Generation from A Single Frequency Source Robert B. Cotton. Jr. Direct-Radiator Loudspeaker System A alysis. . . . . . . . . . Richard H. Small 383 Circuit Design Modifications for Minimizi lg Transient Intermodulation Distortion in Audio Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . hfatti Otala 396 LETTERS TO THE EDITOR COMMITTEE CHAIRMEN M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits A. E. Gruber Finance J. D. Colvin Historical W. L. Robinson Laws & Resolutions W. H. Freitag Library C. R. Anderson Membership G. W. Bartlett Nominations B. B. Bauer Publications Policy H. O. Kaitchuck Sections J. G. McKuight Standards R. T. Bozak Sustaining Memberships W. H. Freitag Tellers Comments on "Articulation Loss of Consonants as a Basis for the Design and Judgment of Sound Reinforcenleilt Systems" (W. K l e n ,JAES 19. 1 1 (December 1971)) . . . . . . . . . . . Herb Chaudiere 401 Reply to "Comments on 'Articolation 1,oss of Consonants as a Basis for the Design and Judgment of Sound Reinforcement Systenis'" (Herb Chaudiere, JAES 20. 5 (June 1972)) . . . . . . . . . . . . . . . . W. Klein 401 Formulas for Distributed Loudspeaker Systems . . . . . . . . . . . . . . . W. Klein 40 1 Reply to "Formulas f o r Distributed Loudspeaker Systeins . . . . . . Don Davis (W. Klein. JAES 20, 5 (June 1972)) 401 Misnomer "RMS Power" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paul W. Klipsch 402 "RRIS Power" Versus Average Power . . . . . . . . . . . . . . . . . . . . . . . D. A. Kerr 403 DEPARTMENTS 42nd Convention . . . . . . . . . . . . . . 406 Complete Convention PI-ogram . . 4 16 Shopping the Audio Market . . . . 436 Sound Track . . . . . . . . . . . . . . . . . 438 News of the Sections . . . . . . . . . . 432 Membership Information . . . . . . . 439 Obituaries . . . . . . . . . . . . . . . . . . . . 444 EDITORIAL BOARD SECTIONS . .I. R. Ashley R. W. Burhans D. H. Cooper J. M. Eargle E. J. Foster M. B. Gardner British Canada Central Europe Japan Los Angeles Midwest New York San Francisco Washington - - . a ADMINISTRATION R. C. Heyser J. M. Hollywood P. Kantrowitz E. L. Kent D. L. Klepper P. W. Klipsch J. H. Kogen D. S. McCoy J. G . McKnight R. A. Moog J. T. Mulliu R. E. Owen M. R. Schroeder C. F. Swisher I. B. Thomas E. L. Torick D. R. von Recklinghausen J. G. Woodward Jacqueline Harvey Managing Editor Robert O. Fehr Editor lngeborg M. Stochl lalCopy Editor Eveljn A. Morris Associate Edltor Hmry F. Olson Editor Emeritus Dorotl yH. Spronck Administrative Secretam SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices. Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017. Membership information and back copies way be obtalned from either office. .Inc!rnal . - - of t h e Audio Eneineerine Societv. Volume 20 No. 5. June. 1972. Published m o n t h l v excepF a n u a r y / e h r u aland r u l / uw h eu nspublished i b i - G o n t h l y , b y t h e Audio n i n e e r i n g Society a n d supplied t o all m e m b e r s i n good standing. Publication office. 124 East 40th Street, New York. N.Y. 10016. Executive office, Room 929. Lincoln Building. 60 East 42nd Street. New York N . Y ' 10017. Second class oostaee oaid a t New York. N.Y. a n d i t a d d i t i o n a l m a i l i n g o f f c e s . Subscrlptlon t o nonmembers, 30 00 er year Copyright 1972 b y t h e A u d o n g r n e e r l n g o c l e t y The J o u r n a l IS Indexed I n t h e Applled Sclence & Technology Index. The Journal of t h e Audlo E n g l n e e r n gS o c e t yhereby g r a n t s p e r r r l s s l o n t o r e p r l n t I n part, a n y oaoer i n t h i s issue i f direct i e r m i s s l o n is obtalned f r o m i t s author(8) a n d credit is given t o t h e i u i h o r ( s ) and t h i s iournal. A'n author. o r h sresearch affiliate rnav h i s .paper in full . reproduce . . i cridit ng t h i s journ l. Thls permission is n o t assignable. 1 The "Journal of t h e Audio Engineering Society" and i t s cover design h a s been registered as a i q t r a dpe m a r k i n t h e United States Patent Offlce
I JOURNAL OF THE I AUDIO EN61NEER116 SOClET! OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer VOLUME 20 1 Harry F. Olson 446 A High-Accuracy Frequency Shifter for Professional Audio Applications Harald Bode and Robert Moog 453 I I An Investigation of the Magnetic Head-Magnetic Tape Contact R. R. Arnold, L. Ja. Ananka, and S. V. Marsov 470 Predistortion Techniques for Complex but Predictable Transmission Systems Michael A. Gerzon 475 , A Quadraphonic Oscilloscope Display Technique . Denald L. Patten 483 PROJECT NOTES/ENGINEERING BRIEFS Measurements of Auditorium Acoustics with a Storage Oscilloscope and Tone Burst Generator . . . . . . . . . . . . . . . . . . . . . . . . . Charles A. Lincoln 490 COMMITTEE CHAIRMEN M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits A. E. Gmber Finance J. D. Colvin Historical W. L. Robinson Laws & Resolutions W. H. Freitag Library C. R. Anderson Membership @. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections 1. G. McKnight Standards R. T. Bozak Sustaining Memberships W. H.Freitag Tellers SECTIONS Aircraft Infrasonic Noise Evaluation Problems . Ralph W. Burhans 492 Correction for "Discrete-Matrix Multichannel Stereo" (Duane H. Cooper and Takeo Shiga, JAES, 20, 346-360 (June 1972)) Duane H. Cooper 493 LETTERS TO THE EDITOR On Accurate Terminology I J. Robert Ashley 494 DEPARTMENTS Standards I . . . . . . . . . . . . . . . . . . . . 496 Exhibits Previews for 43rd Convention . . . . . . . . . . . . . . . . . . 502 News of the Sections . . . . . . . . . . . 518 Sound Track . 524 I Available Literature . 530 Shopping the Audio Market . Membership Information . 533 EDITORIAL BOARD British Canada Central Europe Japan L a Angeles Midwest New York San Francisco Southeastern (Atlanta) Washington, D.C. - . The Sound Field in Home Listening Rooms Roy F. Allison and Robert Berkovitz 458 George W. Bartlett Benjamin B. Bauer R T. Bozak Manin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robinson John E. Volkmann . ARTICLES Field-Type Artificial Voice BOARD OF GOVERNORS . NUMBER 6 J. R. Ashley R. W. Burbans D. H. Cooper J. M. Eargle E. J. Foster M. B. Gardner . ADMINISTRATION R. C. Heyser J. M. Hollywood P. Kantrawitz E. L. Kent D. L. Kleppcr P. W. Klipsch J. H. Kogen D. S. McCoy J. G. McKnight R. A. Moog J. T.Mullin R. E. Owen M. R. Schroeder C. F. Swisher I. B. Thomas E. L. Torick D. R. von Recklinghauscn J. G. Woodward Jacqueline Harvey Managing Editor Robert 0. Fehr Editor Ingeborg M. Stochmal Copy Editor Evelyn A. Morris Associate Editor Harry F. Olson Editor Emeritus Dorothy H. Spronck Administrative Secretary SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 69 East 42nd St., New York, N.Y. 10017. Membership information and back copies may be obtained from either office. -1 Journal o f the Audio Engineering Society, Volume 20, No. 6.July/August. 1972. Published monthly except January/February and July/August when published bi-monthly, by the Audio Engineering Society and supplied to all members i n good standing. Publication office. 124 East 40th Street, New York. N.Y. 10016. Executive office. Room 929. Lincoln Building. 60 East 42nd Street. New York. N.Y, 10017. Second class postage paid a t New York, N.Y. and a t additions! mailing offices. Subscrlpt onto, nonmembers, 30,00 per year. Copyright 1972 by the Audio Engineering Society. The Journal i s ndexedIn the Applied Science &Technology tndex. The Journal of the Audio Engineering Society hereby grants permission t o reprint i n part, any paper i n this issue-if direct permission is obtained from its author(s) and credit i s given t o the author(s) and this journal. An author. or his research affiliate may reproduce his paper i n full crediting this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and its cover design has been registered as a trademark i n the United States Patent Office. I
AUDIO ENGINEERING SOCIETY OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer VOLUME 20 NUMBER 7 SEPTEMBER 1972 ARTICLES Sound-Image Localization in Multichannel Matrix Reprodnction Osamu Kohsaka. Eiji Satoh, and Takeqhi Nakayama 542 Measurements of the
OFFICERS 1971-72 J. G. Woodward President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President
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