一个水平调整的耳频率到位置的地图,用于估计与耳植入物耳植入物频率不匹配的音位差异
bioRxiv : the preprint server for biology
|July 9, 2024
概括
一个新的水平调整的频率位置功能纠正了耳植入器 (CI) 的标准. 这种精细的模型减少了CI用户感知到的解剖频率不匹配,潜在地改善了语音理解和设备编程.
科学领域:
- 听觉神经科学 听觉神经科学
- 生物声学是一种生物声学.
- 医疗器械 医疗器械
背景情况:
- 人类耳中的音位图,将解剖位置与特征频率 (CF) 相联系,对于耳植入物 (CI) 编程至关重要.
- 当前的模型可能无法完全解释声音水平如何影响特定耳部位的感知频率,这可能导致CI用户的频率不匹配.
研究的目的:
- 开发一个水平调整的标准人类耳位置频率函数的校正.
- 用这个更正的函数重新评估CI接受者的解剖频率不匹配.
主要方法:
- 汇编了来自15项动物研究的数据,这些数据是关于耳结构中异常强度反应的.
- 从47个标本中提取了70dB SPL的特征频率和最佳频率.
- 将动物数据转换为人类估计,并应用非线性回归来推导一个水平调整的位置频率函数.
主要成果:
- 在70 dB SPL (BF70) 的最佳频率与CF显著不同,其转移方向和大小取决于耳位置.
- 在距离底部600度之前,BF70向下移动约4半;超过600度后,它向上移动约6半.
- 调整水平的函数表明CIs的解剖频率不匹配程度较小,对于顶端电极可能不存在.
结论:
- 该研究验证了标准的CF位置频率关系,并为在中等音量水平的BF转移引入了水平调整的校正.
- 这种更正的函数可以作为CI编程中更准确的音色基准参考.
- 实施可以提高CI用户的结果,包括感知适应和语音理解.
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