降低光谱分辨率对基于时间一致性的源隔离的影响
Vibha Viswanathan1, Michael G Heinz2, Barbara G Shinn-Cunningham1
1Neuroscience Institute, Carnegie Mellon University, Pitttsburgh, PA 15213.
bioRxiv : the preprint server for biology
|April 8, 2024
概括
降低光谱分辨率会损害听力损失,包括耳植入物 (CI) 用户的个人噪音中的听力. 这种降解会影响大脑分离声音源的能力,影响语音理解.
科学领域:
- 听觉神经科学 听觉神经科学
- 语音感知 语音感知
- 听力损伤 听力损伤
背景情况:
- 听力受损的听众,包括带有耳植入器 (CI) 的听众,在杂的环境中面临理解语言的挑战.
- 在噪音中有效地听取依赖于大脑的听觉源分离,将声音分组成不同的感知流.
- 跨频道的时间连贯性有助于正常听觉的听众在源隔离.
研究的目的:
- 为了调查这种假设,降低光谱分辨率,常见的感觉神经听力损失和CI使用,损害基于时间连贯的听觉分离.
- 模拟降低光谱分辨率的影响,例如CI电流的传播和外部毛细胞损伤,对听觉处理和语音可理解性.
主要方法:
- 开发了一种基于时间连贯的听觉分离的生理学上可信的计算模型.
- 模拟的耳植入物 (CI) 倾听条件,光谱分辨率降低 (电流扩散).
- 使用模型和行为数据,测量了共调掩蔽释放 (CMR) 和预测噪声中的语音可理解性.
主要成果:
- 模型预测表明,CI电流的传播显著降低了共调掩盖释放 (CMR) 和噪音中的语音可理解性.
- 来自模拟CI听力的行为数据证实了该模型的预测.
- 该模型还预测了CMR减少,模拟的外毛细胞损伤水平增加.
结论:
- 降低的光谱分辨率是影响听力隔离和听力受损听众的语音噪音理解的关键因素.
- 研究结果强调了光谱涂抹对时间连贯处理的有害影响,这对于复杂的听觉场景至关重要.
- 这项研究提供了关于感官神经听力损失和CI用户听力困难背后的机制的见解.
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