Auditory brainstem response of the Japanese house bat (Pipistrellus abramus)

The Journal of the Acoustical Society of America
Shokei BokuJames A Simmons

Abstract

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 μs/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.

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Citations

Nov 2, 2015·The Journal of the Acoustical Society of America·Andrea Megela SimmonsJames A Simmons
Dec 14, 2018·The Journal of the Acoustical Society of America·Takafumi FuruyamaKohta I Kobayasi
Oct 9, 2019·The Journal of the Acoustical Society of America·Jinhong LuoJames A Simmons
Dec 20, 2019·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Johannes WetekamManfred Kössl
Mar 25, 2019·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Ziying FuQicai Chen
Nov 18, 2020·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Doreen MöckelPaul A Faure
Aug 25, 2021·Proceedings of the National Academy of Sciences of the United States of America·Inga GeipelRachel A Page

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