OperaV1, Main, Exploration, bibRecord, 001F90

Judgments of noticeable differences in sound fields of concert halls caused by intensity variations in early reflections

Identifieur interne : 001F90 ( Main/Exploration ); précédent : 001F89; suivant : 001F91

Judgments of noticeable differences in sound fields of concert halls caused by intensity variations in early reflections

Auteurs : Toshiyuki Okano [Japon]

Source :

The Journal of the Acoustical Society of America [ 0001-4966 ] ; 2002-01.

RBID : Pascal:02-0066457

Descripteurs français

Pascal (Inist)
- 4355F, Etude expérimentale, Champ acoustique, Acoustique architecturale, Acoustique audio, Réverbération, Réflexion onde acoustique, Intensité son, Intensité acoustique.

English descriptors

KwdEn :
- Acoustic field, Acoustic intensity, Acoustic wave reflection, Acoustics, Amplifiers, Electronic, Architectural acoustics, Audio acoustics, Experimental study, Humans, Judgment, Loudness, Loudness Perception, Music, Reverberation, Sound, Time Factors.
MESH :
- Acoustics, Amplifiers, Electronic, Humans, Judgment, Loudness Perception, Music, Sound, Time Factors.

Abstract

In concert halls early reflections combine with the direct sound and with reverberation to determine the subjective rating of a room's acoustics. Of interest is how variations in the amplitudes of these early reflections are related to the subjectively just-noticeable differences (jnd) in several important acoustical parameters for their wide range encountered in existing halls. Investigated were four subjective parameters, apparent source width (ASW), loudness, intimacy and clarity, which are related to the physical measurements, [1-IACC_E3], G, ITDG, and C₈₀, defined mathematically in Beranek [Concert and Opera Halls: How They Sound (Acoustical Society of America, New York, 1996)]. Forty-eight types of sound fields were chosen in which to make variations in the amplitudes of early reflections and were reproduced electro-acoustically by multiple loudspeakers in an anechoic chamber. The results indicate that ASW and loudness are more sensitive to changes in the levels of early reflections, and were the primary parameters investigated. Although the number of subjects available with enough experience in listening classical music is limited and the measured jnd is an initial estimation, the jnd of [1-IACC_E3] is measured as 0.065±0.015 in variations of sound field structures and the jnd of G was measured as 0.25±0.15dB, which is consistent with the results of previous studies. © 2002 Acoustical Society of America.

Affiliations:

Japon

Le document en format XML

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<term>Music</term>
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<front><div type="abstract" xml:lang="en">In concert halls early reflections combine with the direct sound and with reverberation to determine the subjective rating of a room's acoustics. Of interest is how variations in the amplitudes of these early reflections are related to the subjectively just-noticeable differences (jnd) in several important acoustical parameters for their wide range encountered in existing halls. Investigated were four subjective parameters, apparent source width (ASW), loudness, intimacy and clarity, which are related to the physical measurements, [1-IACC<sub>E3</sub>
], G, ITDG, and C<sub>80</sub>
, defined mathematically in Beranek [Concert and Opera Halls: How They Sound (Acoustical Society of America, New York, 1996)]. Forty-eight types of sound fields were chosen in which to make variations in the amplitudes of early reflections and were reproduced electro-acoustically by multiple loudspeakers in an anechoic chamber. The results indicate that ASW and loudness are more sensitive to changes in the levels of early reflections, and were the primary parameters investigated. Although the number of subjects available with enough experience in listening classical music is limited and the measured jnd is an initial estimation, the jnd of [1-IACC<sub>E3</sub>
] is measured as 0.065±0.015 in variations of sound field structures and the jnd of G was measured as 0.25±0.15dB, which is consistent with the results of previous studies. © 2002 Acoustical Society of America.</div>
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Judgments of noticeable differences in sound fields of concert halls caused by intensity variations in early reflections

Judgments of noticeable differences in sound fields of concert halls caused by intensity variations in early reflections

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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