Variation in the hearing sensitivity of a dolphin population determined through the use of evoked potential audiometry
Variation in the hearing sensitivity of a dolphin population determined through the use of evoked potential audiometry
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DOI：
10.1121/1.2357993
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发表时间：
2006-12-01
影响因子：
2.4
通讯作者：
Finneran, James J.
中科院分区：
文献类型：
--
作者：
Houser, Dorian S.;Finneran, James J.
利用便携式电生理数据采集系统，对圈养的白海豚群体进行听觉诱发电位（AEPs）检测。AEP系统使用了一个嵌入吸盘的换能器，通过下颚向海豚传递调幅音调。诱发电位记录非侵入性使用表面电极。自适应程序允许听力阈值估计从10到150 kHz在一个单一的耳朵在约45分钟。听力阈值测量42头海豚（28男，14女），年龄从4到47岁。听力灵敏度随年龄和性别的变化遵循人类和陆生哺乳动物的模式：一般来说，在人群中，随着年龄的增长，高频听力逐渐丧失，男性听力损失的发病时间早于女性。听力损失一般发生在20岁至30岁之间，所有27岁以上的动物都有一定程度的听力损失。在种群中发现了两只严重听力损失的海豚。在相关的海豚中观察到异常的听力模式，这表明听力能力可能存在遗传联系。(c)2006年，美国声学学会。
A portable electrophysiological data collection system was used to assess hearing in a captive population of bottlenose dolphins by recording auditory evoked potentials (AEPs). The AEP system used a transducer embedded in a suction cup to deliver amplitude modulated tones to the dolphin through the lower jaw. Evoked potentials were recorded noninvasively using surface electrodes. Adaptive procedures allowed hearing thresholds to be estimated from 10 to 150 kHz in a single ear in about 45 min. Hearing thresholds were measured in 42 bottlenose dolphins (28 male, 14 female), ranging in age from 4 to 47 years. Variations in hearing sensitivity with age and sex followed patterns seen in humans and terrestrial mammals: generally, within the population there was a progressive loss of high frequency hearing with age and an earlier onset of hearing loss in males than in females. Hearing loss generally occurred between the ages of 20 and 30, and all animals over the age of 27 had some degree of hearing loss. Two dolphins with profound hearing loss were found within the population. Aberrant hearing patterns were observed in related dolphins suggesting genetic links to hearing ability may exist. (c) 2006 Acoustical Society of America.