Hendrickx Etienne, Paquier Mathieu, Koehl Vincent, Palacino Julian
University of Brest, Centre National de la Recherche Scientifique, Laboratoire des Sciences et Techniques de l'Information, de la Communication et de la Connaissance, Unité Mixte de Recherche 6285, 6 Avenue Victor Le Gorgeu, CS 93837 29238 Brest Cedex 3, France.
J Acoust Soc Am. 2015 Dec;138(6):3686-97. doi: 10.1121/1.4937758.
When presented with a spatially discordant auditory-visual stimulus, subjects sometimes perceive the sound and the visual stimuli as coming from the same location. Such a phenomenon is often referred to as perceptual fusion or ventriloquism, as it evokes the illusion created by a ventriloquist when his voice seems to emanate from his puppet rather than from his mouth. While this effect has been extensively examined in the horizontal plane and to a lesser extent in distance, few psychoacoustic studies have focused on elevation. In the present experiment, sequences of a man talking were presented to subjects. His voice could be reproduced on different loudspeakers, which created disparities in both azimuth and elevation between the sound and the visual stimuli. For each presentation, subjects had to indicate whether the voice seemed to emanate from the mouth of the actor or not. Results showed that ventriloquism could be observed with larger audiovisual disparities in elevation than in azimuth.
当面对空间不一致的视听刺激时，受试者有时会将声音和视觉刺激感知为来自同一位置。这种现象通常被称为知觉融合或腹语术效应，因为它唤起了腹语表演者所制造的错觉，即其声音似乎是从木偶发出而非从其口中发出。虽然这种效应在水平面已得到广泛研究，在距离方面也有一定程度的研究，但很少有心理声学研究关注仰角。在本实验中，向受试者呈现一名男子说话的序列。他的声音可以在不同扬声器上重现，这在声音和视觉刺激之间造成了方位角和仰角的差异。对于每次呈现，受试者必须指出声音是否似乎是从演员口中发出。结果表明，与方位角相比，在仰角上存在更大的视听差异时也能观察到腹语术效应。
