Spatial Hearing Laboratory, Department of Speech and Hearing Science, Arizona State University, P.O. Box 870102, Tempe, Arizona 85287-0102, USA.
J Acoust Soc Am. 2013 Apr;133(4):2301-13. doi: 10.1121/1.4792155.
Listeners localized the free-field sources of either one or two simultaneous and independently generated noise bursts. Listeners' localization performance was better when localizing one rather than two sound sources. With two sound sources, localization performance was better when the listener was provided prior information about the location of one of them. Listeners also localized two simultaneous noise bursts that had sinusoidal amplitude modulation (AM) applied, in which the modulation envelope was in-phase across the two source locations or was 180° out-of-phase. The AM was employed to investigate a hypothesis as to what process listeners might use to localize multiple sound sources. The results supported the hypothesis that localization of two sound sources might be based on temporal-spectral regions of the combined waveform in which the sound from one source was more intense than that from the other source. The interaural information extracted from such temporal-spectral regions might provide reliable estimates of the sound source location that produced the more intense sound in that temporal-spectral region.
听众可以定位一个或两个同时且独立产生的噪声突发的自由场源。当定位一个声源而不是两个声源时，听众的定位性能更好。对于两个声源，当提供有关其中一个声源位置的先验信息时，定位性能更好。听众还可以定位同时具有正弦幅度调制 (AM) 的两个噪声突发，其中调制包络在两个源位置处同相或相差 180°。AM 用于研究听众可能用于定位多个声源的假设。结果支持了以下假设：定位两个声源可能基于组合波形的时频谱区，其中一个声源的声音比另一个声源的声音更强。从这种时频谱区提取的耳间信息可能提供产生该时频谱区较强声音的声源位置的可靠估计。
