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Updated: Sep 9, 2025

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Published on: January 23, 2017

代表性海和海狮的低频听力和掩盖参数)

Jillian M Sills¹, Brandi Ruscher², Noah Packard²

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

The Journal of the Acoustical Society of America

|August 29, 2025

概括

像海和海狮这样的海洋哺乳动物能听到低频的声音, 海表现出更高的敏感性,可能会增加它们对水下噪音污染的脆弱性.

科学领域:

海洋生物学
生物声学
听觉科学

背景情况:

海洋哺乳动物听力低于100Hz的数据有限.
了解低频听力对于评估噪音影响至关重要.

研究的目的:

在低频率下研究海洋哺乳动物的听觉能力.
在噪音存在时量化听觉掩盖效应.

主要方法:

行为听力测试用于测试胡须海 (Erignathus barbatus) 和加利福尼亚海狮 (Zalophus californianus).
在安静和噪音条件下测量听力值.
估计了关键的比率和带宽.

主要成果:

两种物种都检测到低至40赫兹的声音.
在40至100Hz之间,海表现出更高的灵敏度 (低值高达24dB).
这些数据为海洋哺乳动物提供了全面的低频听力数据.

结论:

胡须海和加利福尼亚海狮具有显著的低频听觉灵敏度.
密封可能更容易受到低频噪声的影响.
这些发现有助于了解海洋哺乳动物的听觉掩盖和噪声脆弱性.

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相关概念视频

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,...