Perceptual integration between target speech and target-speech reflection reduces masking for target-speech recognition in younger adults and older adults
Perceptual integration between target speech and target-speech reflection reduces masking for target-speech recognition in younger adults and older adults
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目标语音和目标语音反射之间的感知整合减少了年轻人和老年人目标语音识别的掩蔽
DOI：
10.1016/j.heares.2008.07.006
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发表时间：
2008-10-01
期刊：
影响因子：
2.8
通讯作者：
Li, Liang
中科院分区：
文献类型：
--
作者：
Huang, Ying;Huang, Qiang;Li, Liang
本研究评估了目标语音感知整合和模拟目标语音反射的揭露功能，这些功能由两个空间分离的扬声器呈现。对于听力正常的年轻成年听众和老年性耳聋早期的老年听众来说，将目标语音和目标反射模拟之间的时间间隔（目标间间隔，ITI）从64毫秒减少到0毫秒，不仅可以逐步增强目标语音信号的感知整合，而且可以逐步将目标语音从语音掩蔽或噪声掩蔽中释放出来。当信噪比较低时，年轻听众和年长听众中语音掩蔽的释放均显着大于噪声掩蔽的释放，但老年听众中发生语音掩蔽显着释放的最长 ITI 明显短于年轻听众。这些结果表明，在多说话者语音的混响环境中，直达声波和相关反射之间的感知集成有助于不同声源的感知分离，对于揭露有人参与的语音至关重要。用于从语音掩蔽中释放语音的 ITI 范围与年龄相关的减小可能是老年听众在这种不利环境中遇到语音识别困难的原因之一。 (C) 2008 Elsevier B.V. 保留所有权利。
This study evaluated unmasking functions of perceptual integration of target speech and simulated target-speech reflection, which were presented by two spatially separated loudspeakers. In both younger-adult listeners with normal hearing and older-adult listeners in the early stages of presbycusis, reducing the time interval between target speech and target-reflection simulation (inter-target interval, ITI) from 64 to 0 ms not only progressively enhanced perceptual integration of target-speech signals, but also progressively released target speech from either speech masking or noise masking. When the signal-to-noise ratio was low, the release from speech masking was significantly larger than the release from noise masking in both younger listeners and older listeners, but the longest ITI at which a significant release from speech masking occurred was significantly shorter in older listeners than in younger listeners. These results suggest that in reverberant environments with multi-talker speech, perceptual integration between the direct sound wave and correlated reflections, which facilitates perceptual segregation of various sources, is critical for unmasking attended speech. The age-related reduction of the ITI range for releasing speech from speech masking may be one of the causes for the speech-recognition difficulties experienced by older listeners in such adverse environments. (C) 2008 Elsevier B.V. All rights reserved.