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Updated: Sep 17, 2025

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临时值从中频空气噪声暴露到 sealsa) 中的临时值转移

Colleen Reichmuth¹, Jillian M Sills¹, Jason Mulsow¹

¹Institute of Marine Sciences, Long Marine Laboratory, University of California, Santa Cruz 115 McAllister Way Santa Cruz, California 95060, USA.

The Journal of the Acoustical Society of America

|June 30, 2025

概括

性海显示空气噪声的临时值变化比预期的要小. 他们的听力从低于85dBSL和12分钟的噪音水平恢复.

科学领域:

海洋哺乳动物生物声学
听觉生理学听觉生理学
野生动物声学野生动物声学

背景情况:

空气中的噪音会影响海洋哺乳动物的听力.
了解临时值转移 (TTS) 对保护至关重要.
肉食动物对空中噪音的听觉敏感性尚未得到充分证实.

研究的目的:

评估空气噪声对海听力的残留影响.
在受控噪声暴露之前和之后确定听力值.
为了比较北方大象和港湾海之间的噪音易感性.

主要方法:

行为心理物理学用于获得听力值.
八度波段白噪声暴露 (1或2.5 kHz) 在不同的水平 (65-125 dB SL) 和持续时间 (1.5-50 分钟).
在暴露后测量中心频率的值变化.

主要成果:

两种密封都没有显示一致的TTS低于85dBSL或12分钟持续时间.
同等能量的模型无法准确预测TTS模式.
港湾海表现出不同的反应,在第二阶段需要24dB的更高水平.

结论:

类动物似乎比类动物更适应空气中的噪音引起的听力损失.
潜在的机制包括气管关闭,减少声音传输.
调查结果为海洋噪音污染的环境影响评估提供了信息.

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Sound Intensity Level

Sound Intensity Level

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