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在水 (Trachemys scripta elegans) 中,噪音引起的水下暂时性听力损失

Andria K Salas¹, Alyssa M Capuano¹, Craig A Harms²

¹Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA.

The Journal of the Acoustical Society of America

|August 16, 2023

概括

水下噪音污染导致红耳滑的暂时值转移 (TTS). 即使是低噪音暴露水平也会导致听力损失,这表明海可能比以前认为的对水中噪音更敏感.

科学领域:

水生物质毒理学研究
生物声学是一种生物声学.
感官生态学感官生态学

背景情况:

水域噪音污染对海洋生物构成威胁,可能导致听力损害.
了解水生物种的听觉敏感性对于评估噪音影响至关重要.

研究的目的:

研究持续的水下白噪声对红耳滑 (Trachemys scripta elegans) 的听觉敏感性的影响.
为了确定诱导乌暂时值转移 (TTS) 的声音暴露水平 (SELs).

主要方法:

在16种不同持续时间和振幅的条件下,海暴露在水下白噪声 (155193 dB re 1 μPa2s).
在暴露于噪音之前和之后使用听觉唤起的潜在方法测量400Hz的听觉灵敏度.
分析TTS大小和暴露参数 (持续时间,振幅,SEL) 之间的关系.

主要成果:

所有测试的海都表现出TTS,在大多数测试的SEL中观察到高达40dB的变化.
在TTS大小和暴露持续时间,幅度和SEL之间发现了显著的正相关性.
平均预测的TTS发病水平为160dB对1μPa2s,这表明海对相对较低的噪音水平敏感.

结论:

水对水下噪音污染表现出敏感性,在相对较低的噪音水平下经历听力损失.
在TTS易感性,大小和恢复方面存在个体差异,在更大的班次后,恢复率通常更高.
这些发现凸显了水对其息地的人类噪音的潜在脆弱性.

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Echo

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...