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A diagnostic system measuring or thogonal factors of sound fields in a scale model of auditorium

Identifieur interne : 002565 ( Main/Exploration ); précédent : 002564; suivant : 002566

A diagnostic system measuring or thogonal factors of sound fields in a scale model of auditorium

Auteurs : M. Sakurai [Japon] ; S. Aizawa [Japon] ; Y. Suzumura [Japon] ; Y. Ando [Japon]

Source :

RBID : Pascal:00-0261852

Mots-clés :

Abstract

Based on the model of auditory-brain system which consists of the autocorrelation mechanism, the interaural cross-correlation mechanism between both the auditory pathways, and the specialization of human cerebral hemispheres (Y. Ando 1998 Architectural Acoustics, Blending Sound Sources, Sound Fields, and Listeners New York: AIP Press/Springer-Verlag), a new diagnostic system was developed. After obtaining the binaural impulse response, four orthogonal factors including the SPL, the initial time-delay gap between the direct sound and the first reflection, the subsequent reverberation time and the IACC can be analyzed for the calculation of the scale values of both global and individual subjective preferences. In addition, two more factors extracted from the interaural cross-correlation function τIACC and WIACC, can be figured out. Also, the sound energy, ϕ(0), the effective duration, τe, and fine structures of autocorrelation function of sound signals including the magnitude of first maximum, ϕ1, and its delay time, τ1, can be analyzed. As an example of the measurement, effects of reflectors' array above the stage in a 1/10 scale model of auditorium at each seat are discussed here.


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Based on the model of auditory-brain system which consists of the autocorrelation mechanism, the interaural cross-correlation mechanism between both the auditory pathways, and the specialization of human cerebral hemispheres (Y. Ando 1998 Architectural Acoustics, Blending Sound Sources, Sound Fields, and Listeners New York: AIP Press/Springer-Verlag), a new diagnostic system was developed. After obtaining the binaural impulse response, four orthogonal factors including the SPL, the initial time-delay gap between the direct sound and the first reflection, the subsequent reverberation time and the IACC can be analyzed for the calculation of the scale values of both global and individual subjective preferences. In addition, two more factors extracted from the interaural cross-correlation function τ
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, and its delay time, τ
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, can be analyzed. As an example of the measurement, effects of reflectors' array above the stage in a 1/10 scale model of auditorium at each seat are discussed here.</div>
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