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被暴露于过度压缩音乐的清醒试验小猪的听觉变化
Thamara Suzi Dos Santos1, Pierrick Bordiga2, Paul Avan3
1Laboratoire de Biophysique Neurosensorielle, Université Clermont Auvergne, 63001 Clermont-Ferrand, France; Association La Semaine du son, Paris, France; Speech-Language Pathology and Audiology Department, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Hearing research
|September 22, 2024
概括
过度压缩的音乐,与其原始版本不同,在几内亚猪中引起了长期的听力缺陷. 这突显了音频流中的动态范围压缩带来的新风险,影响听力健康超出了传统的噪声暴露限值.
科学领域:
- 听力学 听力学是指听力学.
- 神经科学是一个神经科学.
- 声学 声学 在声学方面
背景情况:
- 在休活动中暴露于大声的声音是全球性听力风险因素.
- 当前的噪音安全标准依赖于等能量假设,这对于非高斯声音来说是不够的.
- 流媒体服务中的数字音频压缩改变了声音统计数据,远离了高斯分布.
研究的目的:
- 与其原始版本相比,研究过度压缩音乐对听觉的影响.
- 评估对耳功能和听觉神经通路的潜在损伤.
主要方法:
- 几内亚猪接触到原始和过压缩的音乐 (102dBA,4小时).
- 通过耳声发射和中耳肌肉强度来监测听觉效应.
- 在暴露后测量了内毛细胞突触密度.
主要成果:
- 过度压缩的音乐诱导了中耳肌肉强度的持续缺陷 (在7天后达到基线的50%).
- 原创音乐暴露导致1天内完全恢复中耳肌肉力量.
- 两组之间没有观察到内毛细胞突触密度的显著差异.
结论:
- 音频流中的动态范围压缩可以导致长期的听力缺陷.
- 观察到的听力障碍影响的是听觉神经通路,而不是内毛细胞突触.
- 现有的噪音暴露法规可能无法充分保护来自压缩音频的风险.
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