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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,...

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用行为和听觉唤起的潜在方法获得的海豚听力值的量化差异.

Dorian S Houser¹, Kyle Donohoe¹, Jason Mulsow^1,2

¹Department of Conservation Biology, National Marine Mammal Foundation, San Diego, California 92065, USA.

The Journal of the Acoustical Society of America

|March 21, 2025

概括

对比海豚的听觉稳态响应 (ASSR) 方法,发现与行为听觉的差异. 了解这些变化有助于更准确地估计海豚的听力能力.

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科学领域:

海洋生物学海洋生物学
生物声学是一种生物声学.
听觉神经科学听觉神经科学

背景情况:

听觉稳态响应 (ASSR) 对于评估海豚听力至关重要.
不同的ASSR生产方法影响值测量.
行为听力值是海豚听力评估所需的标准.

研究的目的:

为了比较海豚的听觉稳态响应 (ASSR) 和行为听觉值.
为了评估不同ASSR刺激 (SAM音色,音色管道列车) 和测试介质 (空气,水) 对值准确度的影响.
建立ASSR和行为值之间的关系,以改善海豚听力评估.

主要方法:

通过接触式传感器测试了五只海豚,使用侧侧振幅调制 (SAM) 音色和音色管道列车.
ASSR测试是在空气中和部分浸泡在水中的海豚进行的.
在ASSR测试的同一天,使用纯色调刺激测量了水下行为听力值.

主要成果:

无论测试介质如何,正弦振幅调制 (SAM) 音调始终高估了行为值.
音频管道列车低估了空气中的值,并在水中显示了频率依赖的高/低估值.
ASSR和行为值之间的平均差异通常在音调管列车中较小,但在听力极限附近显示出显著的夸张.

结论:

选择ASSR刺激和测试介质显著影响海豚听力值测量.
与SAM音调相比,音调管列车提供了一个更一致的,虽然不是完美的,行为值的近似.
了解ASSR和行为值之间的差异,可以更准确地估计海豚的听觉灵敏度.