幅度压缩用于防止在谈话语音水平以上的翻转
Michal Fereczkowski1,2, Raul H Sanchez-Lopez3, Stine Christiansen1,2
1Institute of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
Trends in hearing
|January 5, 2024
概括
这项研究发现,助听器中的缓慢作用的压缩设置显著改善了在较高音量下"翻转"的个体的语音可理解性和听众偏好. 在较低的水平上,人们更喜欢标准的助听器设置.
科学领域:
- 听力学 听力学是指听力学.
- 语音语言病理学 语音语言病理学
- 助听器技术 助听器技术
背景情况:
- 助听器使用非线性放大来增强语音感知.
- 在较高的声音水平下,语音可理解性可能会下降,这种现象被称为"翻转",特别是在听力损失的个体中.
- 以前的研究将安静中的翻转与线性放大噪音中的语音理解差异联系在一起.
研究的目的:
- 调查不同幅度压缩设置在减轻助听器用户语音可理解性翻转方面的有效性.
- 为了比较新的"甜点"压缩策略和标准的助听器配套规则之间的语音可理解性和听众偏好.
主要方法:
- 通过使用三个幅度压缩设置重新测试16名参与者,确定了翻转:缓慢起作用的甜点,快速起作用的甜点和国家声学实验室非线性1 (NAL-NL1) 规则.
- 在安静和噪音环境下,在各种音量级下评估语音可理解性.
- 收集不同压缩设置的对对偏好判断.
主要成果:
- 与NAL-NL1设置相比,缓慢作用的甜点压缩在70dB SPL及以上的声音水平下在安静和噪音中显示出更高的语音可理解性.
- 参与者显然更喜欢在较高音量下缓慢作用的甜点压缩.
- 在较低的音量级下,这三种设置都产生了相似的可理解性,首选的是NAL-NL1设置.
结论:
- 缓慢作用的甜点点压缩为倾倒的助听器用户提供了显著的好处,特别是在70 dB SPL和更高的声音水平.
- 对于较低的噪音水平,既定的增强目标,例如来自NAL-NL1规则的目标,仍然更合适.
- 这些发现表明,根据声音水平和个体语音感知特征,对助听器压缩设置采取量身定制的方法.
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