Stimulus factors influencing spatial release from speech-on-speech masking
Stimulus factors influencing spatial release from speech-on-speech masking
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DOI：
10.1121/1.3478781
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发表时间：
2010-10-01
影响因子：
2.4
通讯作者：
Marrone, Nicole
中科院分区：
文献类型：
--
作者：
Kidd, Gerald, Jr.;Mason, Christine R.;Marrone, Nicole
本研究探讨了空间释放掩蔽（SRM）时，一个目标说话者被掩盖的竞争说话者或其他类型的声音。重点是在不同的条件下，在信息掩蔽（IM）的强度的双耳时间差（ITDs）和随时间变化的双耳电平差（ILD）的作用。在第一个实验中，一个目标说话者被其他两个说话者所掩盖，这两个说话者要么与目标共处一地，要么与目标在空间上对称地分开，通过扬声器提供刺激。声音被过滤到不同的频率区域，以限制可用的耳间线索。最大的SRM发生在宽带条件下，然后是低通条件。然而，即使是最高频率的带通滤波条件（3-6 kHz）产生了显着的SRM。在第二个实验中，刺激通过耳机呈现。当掩蔽者与目标共处或被ITD感知分离时，听者识别出被一个或两个其他说话者或噪声掩蔽的目标说话者的语音。结果揭示了一个复杂的模式的掩蔽，其中影响性能的因素在同地和空间分离的条件下，在很大程度上是独立的。(C)2010年美国声学学会。[DOI 10.1121/1.3478781]
This study examined spatial release from masking (SRM) when a target talker was masked by competing talkers or by other types of sounds. The focus was on the role of interaural time differences (ITDs) and time-varying interaural level differences (ILDs) under conditions varying in the strength of informational masking (IM). In the first experiment, a target talker was masked by two other talkers that were either colocated with the target or were symmetrically spatially separated from the target with the stimuli presented through loudspeakers. The sounds were filtered into different frequency regions to restrict the available interaural cues. The largest SRM occurred for the broadband condition followed by a low-pass condition. However, even the highest frequency bandpass-filtered condition (3-6 kHz) yielded a significant SRM. In the second experiment the stimuli were presented via earphones. The listeners identified the speech of a target talker masked by one or two other talkers or noises when the maskers were colocated with the target or were perceptually separated by ITDs. The results revealed a complex pattern of masking in which the factors affecting performance in colocated and spatially separated conditions are to a large degree independent. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3478781]