Counter S A
Comp Biochem Physiol A Comp Physiol. 1985;81(4):837-45. doi: 10.1016/0300-9629(85)90916-8.
Brain-stem auditory evoked potentials (BAEP) recorded from the seagull were large-amplitude, short-latency, vertex-positive deflections which originate in the eighth nerve and several brain-stem nuclei. BAEP waveforms were similar in latency and configurations to that reported for certain other lower vertebrates and some mammals. BAEP recorded at several pure tone frequencies throughout the seagull's auditory spectrum showed an area of heightened auditory sensitivity between 1 and 3 kHz. This range was also found to be the primary bandwidth of the vocalization output of young seagulls. Masking by white noise and pure tones had remarkable effects on several parameters of the BAEP. In general, the tone- and click-induced BAEP were either reduced or obliterated by both pure tone and white noise maskers of specific signal to noise ratios and high intensity levels. The masking effects observed in this study may be related to the manner in which seagulls respond to intense environmental noise. One possible conclusion is that intense environmental noise, such as aircraft engine noise, may severely alter the seagull's localization apparatus and induce sonogenic stress, both of which could cause collisions with low-flying aircraft.
从海鸥身上记录到的脑干听觉诱发电位（BAEP）是起源于第八神经和几个脑干核团的大幅度、短潜伏期、头顶正向偏转。BAEP波形在潜伏期和形态上与其他一些低等脊椎动物和某些哺乳动物所报告的相似。在海鸥整个听觉频谱的几个纯音频率下记录的BAEP显示，在1至3千赫之间存在一个听觉敏感度增强的区域。该范围也是幼海鸥发声输出的主要带宽。白噪声和纯音掩蔽对BAEP的几个参数有显著影响。一般来说，特定信噪比和高强度水平的纯音和白噪声掩蔽器会使纯音和点击诱发的BAEP降低或消失。本研究中观察到的掩蔽效应可能与海鸥对强烈环境噪声的反应方式有关。一个可能的结论是，强烈的环境噪声，如飞机发动机噪声，可能会严重改变海鸥的定位装置并诱发声源性应激，这两者都可能导致与低空飞行的飞机相撞。
