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Journal of the Acoustical Society of America

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Aug 2003

Volume 114, Issue 2, pp. 551-1166

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Preliminary Notice: 146th Meeting of the Acoustical Society of America

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 551-555 (2003); (5 pages)

Online Publication Date: 30 Jul 2003

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43.05.Hw Meetings
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Institute of Acoustics awards Rayleigh Medal to Hugo Fastl

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 558-558 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.10.Ce Conferences, lectures, and announcements (not of the Acoustical Society of America)
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Acoustic Communication in Insects and Anurans: Common Problems and Diverse Solutions

H. Carl Gerhardt, Author, Franz Huber, Author, and Andrea Megela Simmons, Reviewer

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 559-559 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.10.Hj Books and book reviews
43.80.-n Bioacoustics
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Evaluation of sound fields in a concert hall involving scattered reflections applying the subjective preference theory (A)

Yukio Suzumura

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 560-560 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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Convex tilted rear walls in a stage enclosure, an array of circular columns installed in front of walls, and triangular reflectors above the stage were newly adopted as scattering obstacles in an acoustic design of Tsuyama Music Cultural Hall, called “Bell Folêt Tsuyama.” The fundamental shape of the hall was designed using the theory of subjective preference. To calculate the effects of scattered reflections on a sound field in a real concert hall is extremely laborious. For this reason, the evaluation of effects of scattered reflections on the sound field in the hall was made experimentally by use of a math acoustical scale. After construction of the hall, therefore, sound fields of the hall, which involves scattered reflections caused by the tilted convex rear, by the array of circular columns, and by the triangular reflectors, were measured using four orthogonal physical factors (LL, Δt1, Tsub, IACC) described in the theory and the acoustical character of these scattering obstacles was clarified. Results clearly showed that these new attempts on scattered reflections substantially improved the quality of the sound field in the hall.
Thesis advisor: Yoichi Ando
Copies of this thesis written in English can be obtained from Yukio Suzumura. E-mail address: ysuzu11@lapis.plala.or.jp
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43.55.Fw Auditorium and enclosure design
43.55.Br Room acoustics: theory and experiment; reverberation, normal modes, diffusion, transient and steady-state response
43.55.Ka Computer simulation of acoustics in enclosures, modeling

On the temporal window of auditory-brain system in connection with subjective responses (A)

Kiminori Mouri

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 560-560 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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The human auditory-brain system processes information extracted from autocorrelation function (ACF) of the source signal and interaural cross correlation function (IACF) of binaural sound signals which are associated with the left and right cerebral hemispheres, respectively. The purpose of this dissertation is to determine the desirable temporal window (2T: integration interval) for ACF and IACF mechanisms. For the ACF mechanism, the visual change of Φ(0), i.e., the power of ACF, was associated with the change of loudness, and it is shown that the recommended temporal window is given as about 30(τe)min [s]. The value of (τe)min is the minimum value of effective duration of the running ACF of the source signal. It is worth noticing from the experiment of EEG that the most preferred delay time of the first reflection sound is determined by the piece indicating (τe)min in the source signal. For the IACF mechanism, the temporal window is determined as below: The measured range of τIACC corresponding to subjective angle for the moving image sound depends on the temporal window. Here, the moving image was simulated by the use of two loudspeakers located at ±20° in the horizontal plane, reproducing amplitude modulated band-limited noise alternatively. It is found that the temporal window has a wide range of values from 0.03 to 1 [s] for the modulation frequency below 0.2 Hz.
Thesis advisor: Yoichi Ando
Copies of this thesis written in English can be obtained from Kiminori Mouri, 5-3-3-1110 Harayama-dai, Sakai city, Osaka 590-0132, Japan. E-mail address: km529756@aol.com
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43.60.Gk Space-time signal processing, other than matched field processing
43.64.Bt Models and theories of the auditory system

Subjective preference evaluation of sound fields by performing singers (A)

Dennis Noson

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 560-560 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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A model of the auditory process is proposed for performing singers, which incorporates the added signal from bone conduction, as well as the psychological distance for subjective preference of the performer from the acoustic sound field of the stage. The explanatory power of previous scientific studies of vocal stage acoustics has been limited by a lack of an underlying theory of performer preference. Ando’s theory, using the autocorrelation function (ACF) for parametrizing temporal factors, was applied to interpretation of singer sound field preference determined by the pair comparison method. Melisma style singing (no lyrics) was shown to increase the preferred delay time of reflections from a mean of 14 ms with lyrics to 23 ms without (p<0.05). The extent of the shift in preferred time delay was shown to be directly related to minima of the effective duration of the running ACF, (τe)min, calculated from each singer’s voice. Voice matching experiments for singers demonstrated a strong overestimate of the voice outside the head compared with the singer’s own voice (22.4 dB overestimate, p<0.01). Individual singer melisma singing delay preferences were compared for “ah” versus “hum” syllables, and the increased delay preference (41 ms) was shown to be correlated with (τe)min (r2<0.68, p<0.01). When the proposed bone conduction model was applied, using the measured overestimate of sound level of the singer’s own voice for each singer (9.9 dB mean overestimate difference between “ah” and “hum,” p<0.01), the relationship of singer preference to (τe)min was improved (r2 = 0.97, p<0.01).
Thesis advisor: Yoichi Ando
Copies of this thesis are available from the author by inquiry at BRC Acoustics, 1741 First Avenue South, Seattle, WA 98134 USA. E-mail address: dnoson@brcacoustics.com
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43.55.Hy Subjective effects in room acoustics, speech in rooms
43.66.Mk Temporal and sequential aspects of hearing; auditory grouping in relation to music
43.75.Rs Singing
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Acoustically enhanced paint application (P)

Anthony A. Ruffa

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 561-561 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.35.Zc Use of ultrasonics in nondestructive testing, industrial processes, and industrial products

Electrodynamic transducer for underwater acoustics (P)

Vito Suppa

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 561-561 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Dv Electromagnetic and electrodynamic transducers

Pickup unit incorporated in stringed instrument for converting vibrations of string to electric signal in good fidelity (P)

Yojiro Takabayashi

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 561-562 (2003); (2 pages)

Online Publication Date: 30 Jul 2003

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43.38.Fx Piezoelectric and ferroelectric transducers

Dual-chamber loudspeaker (P)

Jeffrey S. Anderson

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 562-562 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Ja Loudspeakers and horns, practical sound sources

Acoustic protective cover assembly (P)

Chad Anthony Banter and Brian G. Chapman

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 562-562 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Kb Microphones and their calibration

Disk playback device and method of continuously playing back disks without a break in sound reproduction (P)

Masanao Yoshida

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 562-562 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Md Sound recording and reproducing systems, general concepts

Three-dimensional sound system and method using head related transfer function (P)

Dong-Ook Chung

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 562-562 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

System for creating and amplifying three dimensional sound employing phase distribution and duty cycle modulation of a high frequency digital signal (P)

Eldon Byrd

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 563-563 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

Apparatus and method for localizing sound image (P)

Joji Kasai

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 563-563 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

Surround sound panner (P)

Jonathan S. Abel and William Putnam

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 563-563 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

Stereophonic sound image enhancement apparatus and stereophonic sound image enhancement method (P)

Kenji Kamada

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 563-563 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

Microphone apparatus for producing signals for surround reproduction (P)

John J. Iredale and Roger S. Keller

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 563-563 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Vk Stereophonic reproduction

Pulse sampled optical fiber hydrophone array (U) (P)

Eugene L. Green

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.38.Zp Acoustooptic and photoacoustic transducers

Game racquet with separate head and handle portions for reducing vibration (P)

William D. Severa

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Tm Vibration isolators, attenuators, and dampers

Material having the capacity of absorbing vibration (P)

Archer C. C. Chen

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Tm Vibration isolators, attenuators, and dampers

Vibration control apparatus (P)

Bjarni V. Tryggvason

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Tm Vibration isolators, attenuators, and dampers

Vibration damping apparatus using magnetic circuit (P)

Etsunori Fujita

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Tm Vibration isolators, attenuators, and dampers

Vibration damper (P)

Kazuhito Misaji

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Tm Vibration isolators, attenuators, and dampers

Energy redistribution system for a vibrating system (P)

Gregg K. Hobbs

J. Acoust. Soc. Am. Volume 114, Issue 2, pp. 564-564 (2003); (1 page)

Online Publication Date: 30 Jul 2003

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43.40.Yq Instrumentation and techniques for tests and measurement relating to shock and vibration, including vibration pickups, indicators, and generators, mechanical impedance
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