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Influence de la position d’une source sur le niveau sonore perçu

Abstract : In our daily environment, we perceive sounds coming from different distances and different directions. The loudness of these sounds depends on the relative position (in distance and direction) of their sources. This thesis is structured in two distinct parts studying these relations. One part focuses on links between loudness and sound source azimuth and the other on links between loudness and frontal sound source distance. The first part focuses more precisely on directionnal effects due to interaural time differences for low- frequency sounds. These differences, which depend on the sound source azimuth and which are maximal when the source is located at the side of the listener, lead to an increase in loudness for low-frequency sounds. This loudness increase is studied when sounds are presented in noise and in presentation conditions with different ecological validity. The second part of this thesis focuses on two distinct kinds of loudness (one being the loudness “at the ears” and the other the loudness “at the source”) as a function of the distance of a sound source, with and without visual cues to the latter. This part studies unfamiliar (white noises) and familiar (speech) stimuli, the latters providing the listeners with information about their source power thanks to their timbre.
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Submitted on : Thursday, February 6, 2020 - 3:24:45 PM
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  • HAL Id : tel-02469434, version 1


Gauthier Berthomieu. Influence de la position d’une source sur le niveau sonore perçu. Acoustique [physics.class-ph]. Université de Bretagne Occidentale, 2019. Français. ⟨tel-02469434⟩



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