Speech intelligibility in rooms: Disrupting the effect of prior listening exposure.
Speech intelligibility in rooms: Disrupting the effect of prior listening exposure.
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DOI：
10.1121/1.5038278
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
E. Brandewie;P. Zahorik
中科院分区：
文献类型：
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作者：
E. Brandewie;P. Zahorik
已经证明，事先暴露在混响环境中的听力可以改善在该环境中的言语理解。以前的研究表明，这种效应的积累是短暂的(不到1 S)，似乎很大程度上是由暴露于室内环境的时间调制特征引起的。预计可能会导致这一进程中断的情况尚未得到证实。这项研究试图通过展示声学环境中的哪些类型的变化导致房间暴露现象的细分来解决这个问题。使用以声学环境突然变化为特征的语音载体短语，当房间的后期混响特征发生变化时，可以观察到房间暴露效果的崩溃，这表明房间环境不同。在同一房间环境中，早期反射模式的变化不会导致崩溃。由于导致击穿的环境情况也导致到达耳朵的信号的宽带时间调制特性发生了实质性变化，因此本研究的结果为房间暴露现象与环境的时间调制特性有关的假设提供了额外的支持。
It has been demonstrated that prior listening exposure to reverberant environments can improve speech understanding in that environment. Previous studies have shown that the buildup of this effect is brief (less than 1 s) and seems largely to be elicited by exposure to the temporal modulation characteristics of the room environment. Situations that might be expected to cause a disruption in this process have yet to be demonstrated. This study seeks to address this issue by showing what types of changes in the acoustic environment cause a breakdown of the room exposure phenomenon. Using speech carrier phrases featuring sudden changes in the acoustic environment, breakdown in the room exposure effect was observed when there was change in the late reverberation characteristics of the room that signaled a different room environment. Changes in patterns of early reflections within the same room environment did not elicit breakdown. Because the environmental situations that resulted in breakdown also resulted in substantial changes to the broadband temporal modulation characteristic of the signal reaching the ears, results from this study provide additional support for the hypothesis that the room exposure phenomenon is linked to the temporal modulation characteristics of the environment.