大鼠对包络耳间时间差的微秒级敏感性。

Microsecond sensitivity to envelope interaural time differences in rats.

机构信息

Department of Biomedical Sciences, City University of Hong Kong, 31 To Yuen Street, Kowloon Tong, Hong

Acoustics Lab, School of Physics and Optoelectronics, South China University of Technology, Guangzhou,

出版信息

J Acoust Soc Am. 2019 May;145(5):EL341. doi: 10.1121/1.5099164.

DOI:10.1121/1.5099164

PMID:31153346

Abstract

Currently, there is controversy around whether rats can use interaural time differences (ITDs) to localize sound. Here, naturalistic pulse train stimuli were used to evaluate the rat's sensitivity to onset and ongoing ITDs using a two-alternative forced choice sound lateralization task. Pulse rates between 50 Hz and 4.8 kHz with rectangular or Hanning windows were delivered with ITDs between ±175 μs over a near-field acoustic setup. Similar to other mammals, rats performed with 75% accuracy at ∼50 μs ITD, demonstrating that rats are highly sensitive to envelope ITDs.

摘要

目前，关于大鼠是否能利用两耳时间差（ITD）进行声源定位存在争议。在这里，我们使用自然脉冲序列刺激，通过二选一强制选择声源定位任务，评估大鼠对起始和持续 ITD 的敏感性。使用近场声学设置，在 ±175μs 的范围内，通过矩形或汉宁窗以 50Hz 至 4.8kHz 的脉冲率传输 ITD。与其他哺乳动物类似，大鼠在约 50μs ITD 时的准确率为 75%，这表明大鼠对包络 ITD 非常敏感。