Influence of interaural time differences on the loudness of low-frequency pure tones at varying signal and noise levels

Gauthier Berthomieu 1, * Vincent Koehl 1 Mathieu Paquier 1
* Auteur correspondant
1 Lab-STICC_UBO_CID_IHSEV
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : Directional loudness sensitivity, which is generally accounted for by at-ear pressure modifications because of the perturbation of the sound field by the head, has been reported to occur at 400 Hz where shadowing effects are usually considered small. Then, an effect of the interaural time difference (ITD) on loudness has been observed for pure tones below 500 Hz. The latter was rather small but still significant, contributing to directional loudness sensitivity. In addition, it has been shown that the effect of ITD on loudness was caused by the ITD itself and not by its related localization. As this effect appeared significant at low level only (40 phon), it was hypothesized that ITD could help separate the signal from the internal noise and enhance its loudness. The aim of the present study is to confirm this hypothesis by observing the effect of ITD on the loudness of low-frequency pure tones (100 and 200 Hz) for various signal-to-noise ratios. The signal level was varied from 30 to 90 phon and the noise could be internal only or external also. The effect of ITD appeared significant up to 40 or 50 phones depending on the frequency.
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Communication dans un congrès
Acoustics '17 Boston, the third joint meeting of the Acoustical Society of America and the European Acoustics Association, Jun 2017, Boston, United States. 141, 2017, 〈http://acousticalsociety.org/content/acoustics-17-boston〉. 〈10.1121/1.4989055〉
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Soumis le : mercredi 10 janvier 2018 - 09:28:43
Dernière modification le : mardi 16 janvier 2018 - 16:00:36
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Gauthier Berthomieu, Vincent Koehl, Mathieu Paquier. Influence of interaural time differences on the loudness of low-frequency pure tones at varying signal and noise levels . Acoustics '17 Boston, the third joint meeting of the Acoustical Society of America and the European Acoustics Association, Jun 2017, Boston, United States. 141, 2017, 〈http://acousticalsociety.org/content/acoustics-17-boston〉. 〈10.1121/1.4989055〉. 〈hal-01558160〉

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