比较语音编码语音对行为元音识别的影响以及响应后的频率
Katelyn A Berg1, Spencer B Smith2, René H Gifford1
1Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.
International journal of audiology
|November 12, 2025
概括
这项研究发现,虽然更多的光谱通道改善了噪声编码语音识别,但频率后响应 (FFR) 并没有反映这些改进,这表明FFR可能无法跟踪光谱变化.
科学领域:
- 听觉神经科学 听觉神经科学
- 语音感知 语音感知
- 神经生理学 神经生理学
背景情况:
- 了解神经处理受损的语音对于助听器开发至关重要.
- 频率下列响应 (FFR) 提供了听觉神经编码的客观测量.
- 光谱线索,语音感知和FFR之间的关系仍然不清楚.
研究的目的:
- 为了研究噪声编码语音中的光谱分辨率如何影响脑干神经表示,使用FFR.
- 为了确定行为元音识别与FFR峰值F0幅度之间的关系.
主要方法:
- 在受试者内部的设计中,在未处理和噪声编码的语音 (1-16通道) 中,比较了母音识别和FFR.
- 十五个正常听觉的成年人参与了这项研究.
- 测量FFR是在对/da/刺激的反应中进行的.
主要成果:
- 随着频道数量的增加,行为元音识别显著改善.
- 在各种条件中没有观察到FFR峰值F0幅度的显著增加.
- 没有发现FFR幅度和母音识别分数之间的相关性.
结论:
- 在噪声编码条件下,语音感知的改善与光谱分辨率 (频道数) 有关.
- FFR主要反映了语音编码信号的时间周期性,而不是频谱变化.
- FFR可能不是一个合适的客观措施来评估光谱分辨率对语音感知的影响.
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