回声定位发射和耳朵接收的结合增强了大棕蝠（棕蝠）的定向频谱线索。

The combination of echolocation emission and ear reception enhances directional spectral cues of the big brown bat, Eptesicus fuscus.

作者信息

Wotton J M, Jenison R L, Hartley D J

机构信息

Department of Neurophysiology, University of Wisconsin, Madison 53706, USA.

出版信息

J Acoust Soc Am. 1997 Mar;101(3):1723-33. doi: 10.1121/1.418271.

DOI:10.1121/1.418271

PMID:9069638

Abstract

The acoustic information used by bats is produced by a combination of the properties of the sound emission and the reception at the eardrum. The potential localization cues used by bats can only be fully revealed when the magnitude spectra of the emission and the external ear are convolved to produce the echolocation combination magnitude spectra. The spatially dependent changes in the magnitude spectra of the echolocation combination of Eptesicus fuscus are described. The emission and external ear magnitude spectra act together to enhance the potential localization cues. In the echolocation combination, the spectral peaks are sharpened and there is greater contrast in intensity between peaks and notches when compared to the spectra of the ear alone. The spectral localization cues in the echolocation combination appear to be restricted to a cone of space of approximately +/-30 degrees.

摘要

蝙蝠所使用的声学信息是由声音发射特性与鼓膜接收特性共同作用产生的。只有当发射信号的幅度谱与外耳的幅度谱进行卷积以产生回声定位组合幅度谱时，蝙蝠所使用的潜在定位线索才能完全显现出来。本文描述了棕蝠回声定位组合幅度谱在空间上的相关变化。发射信号和外耳幅度谱共同作用，增强了潜在的定位线索。在回声定位组合中，与单独的外耳谱相比，谱峰更加尖锐，峰与谷之间的强度对比度更大。回声定位组合中的谱定位线索似乎局限于大约±30度的空间锥内。