Speech segregation in rooms: Monaural, binaural, and interacting effects of reverberation on target and interferer
Speech segregation in rooms: Monaural, binaural, and interacting effects of reverberation on target and interferer
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DOI：
10.1121/1.2871943
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发表时间：
2008-04-01
影响因子：
2.4
通讯作者：
Culling, John F.
中科院分区：
文献类型：
--
作者：
Lavandier, Mathieu;Culling, John F.
为了研究混响对空间分离的目标和受试者的语音清晰度的影响，在虚拟房间中测量了语音接收阈值。测量是在耳机下实现的，使用目标句子和噪音或两个声音干扰器。房间模拟允许房间表面的吸收系数的变化独立于目标和反射器。直接混响比和源的耳间相干性也通过考虑双耳和diotic听独立地变化。混响对受试者的主要影响是双耳的，并由相干性介导，这与双耳去掩蔽理论相一致。它出现在比混响对目标的影响更低的混响水平，这主要是单声道的，并与直接混响比相关，并且可以通过混响语音信号中的幅度调制的损失来解释。这种效果在双耳听的时候稍微小一些。混响也可能导致听觉系统利用基频差异来分离竞争声音的机制中断，以及与语音识别器相关的“间隙倾听”中断。这些中断可以解释混响对目标和双语音干扰者的影响之间的相互作用。(C)2008年，美国声学学会。
Speech reception thresholds were measured in virtual rooms to investigate the influence of reverberation on speech intelligibility for spatially separated targets and interferers. The measurements were realized under headphones, using target sentences and noise or two-voice interferers. The room simulation allowed variation of the absorption coefficient of the room surfaces independently for target and interferer. The direct-to-reverberant ratio and interaural coherence of sources were also varied independently by considering binaural and diotic listening. The main effect of reverberation on the interferer was binaural and mediated by the coherence, in agreement with binaural unmasking theories. It appeared at lower reverberation levels than the effect of reverberation on the target, which was mainly monaural and associated with the direct-to-reverberant ratio, and could be explained by the loss of amplitude modulation in the reverberant speech signals. This effect was slightly smaller when listening binaurally. Reverberation might also be responsible for a disruption of the mechanism by which the auditory system exploits fundamental frequency differences to segregate competing voices, and a disruption of the "listening in the gaps" associated with speech interferers. These disruptions may explain an interaction observed between the effects of reverberation on the targets and two-voice interferers. (C) 2008 Acoustical Society of America.