Auditory brainstem response of the Japanese house bat (Pipistrellus abramus)
Auditory brainstem response of the Japanese house bat (Pipistrellus abramus)
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DOI：
10.1121/1.4908212
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发表时间：
2015-03-01
影响因子：
2.4
通讯作者：
Simmons, James A.
中科院分区：
文献类型：
--
作者：
Boku, Shokei;Riquimaroux, Hiroshi;Simmons, James A.
从日本家蝠的下丘记录了对包含该物种发声库的高频听觉脑干反应（ABR）。系统地降低音调的振幅以获得在不同音调频率下的响应阈值。编辑的听力图在4至80 kHz的频率范围内呈宽U形，低阈值在20至50 kHz之间。最敏感的频率区域为35-50 kHz，出现在蝙蝠的下扫调频回声定位脉冲的准恒定频率终端部分。延伸到20 kHz的良好灵敏度包括通信声音的第一谐波的频率范围。ABR听力图没有显示出明显的，窄峰的更大的灵敏度在优势频率的物种发声。ABR反应峰值的潜伏期随刺激强度的减弱而延长。在40 kHz时，反应潜伏期与振幅的比值为-7至-9 μ s/dB，这个值小于另一种使用较低频率进行回声定位的调频蝙蝠的测量值。这些结果对理解振幅-潜伏期交易在比较背景下的重要性具有启示意义。(C)2015年美国声学学会。
Auditory brainstem responses (ABR) to high frequencies encompassing the species' vocal repertoire were recorded from the inferior colliculus of the Japanese house bat, Pipistrellus abramus. Amplitudes of tone pips were systematically decreased to obtain a threshold of response at different tone frequencies. The compiled audiogram has a broad U-shape over the frequency range from 4 to 80 kHz, with low thresholds between 20 and 50 kHz. The most sensitive frequency region of 35-50 kHz occurs at the quasi-constant-frequency terminal portion of the bat's downsweeping frequency-modulated echolocation pulses. Good sensitivity extending down to 20 kHz includes the frequency range of the first harmonic of communication sounds. The ABR audiogram does not show distinct, narrow peaks of greater sensitivity at the dominant frequencies in species vocalizations. Latencies of peaks in ABR responses lengthened as stimuli were attenuated. At 40 kHz, response latencies traded with amplitude by -7 to -9 mu s/dB, a value smaller than measured in another frequency-modulated bat using lower frequencies for echolocation. These results have implications for understanding the significance of amplitude-latency trading in a comparative context. (C) 2015 Acoustical Society of America.