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模拟和真实耳植入物用户在安静和背景噪音中的声音歧视

Michal Levin¹, Yael Zaltz^1,2

¹Department of Communication Disorders, The Stanley Steyer School of Health Professions, Faculty of Medicine, Tel Aviv University, Israel.

Journal of speech, language, and hearing research : JSLHR

|November 22, 2023

概括

对于耳植入物 (CI) 用户和模拟器来说,背景噪音对语音歧视的影响不同. 虽然噪音阻碍了模拟的CI性能,但它对实际CI用户的影响很小,这表明在语音和语音任务中依赖自下而上的处理.

科学领域:

听觉神经科学听觉神经科学
语音感知语音感知
假肢听力听力假肢听力

背景情况:

耳植入物 (CI) 用户经常在安静中与语音歧视 (VD) 斗争,特别是与扬声器基本频率 (f0) 和声道长度 (VTL) 线索.
了解背景噪音如何影响CI用户的VD对于改善听力康复至关重要.

研究的目的:

调查背景噪音对正常听力听众使用声学耳植入物 (CI) 模拟和在语言前聋CI用户的声音歧视 (VD) 的影响.
确定有助于良好的语音识别值 (SRT) 的噪音水平是否也会影响VD.

主要方法:

48名正常听力 (NH) 听众使用噪声激发或神经波声编码器进行CI模拟,以及10名先前语言聋的CI用户.
评估了信号与噪声比率 (SRT),然后在安静和噪声环境下进行了自适应语音区分 (VD) 测试 (SRTn + 5 dB).
使用基本频率 (f0),声道长度 (VTL) 或两种线索进行VD测试.

主要成果:

与正弦波声编制器相比,噪声激发的声编制器更好地模拟了CI语音歧视 (VD).
背景噪声对CI用户的视觉损伤影响很小,但对CI模拟听众有明显的影响.
只有在CI模拟听器中观察到信号噪声比 (SNR) 和基于VTL的VD之间的显著关联.

结论:

对于模拟CI使用的正常听力听众来说,有助于语音识别的噪音可能会损害语音歧视,可能是由于依赖自下而上的感官处理.
语音之前聋的CI用户显示噪音对VD的影响很小,这表明他们对语音识别和语音歧视都高度依赖自下而上的处理.

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