Henson O W, Pollak G D, Kobler J B, Henson M M, Goldman L J
Hear Res. 1982 Jul;7(2):127-47. doi: 10.1016/0378-5955(82)90010-7.
Cochlear microphonic (CM) potentials were recorded from the bat, Pteronotus p. parnellii during tethered flight and during simulated flight on a pendulum. For each emitted signal the frequency of the ca. 61 kHz constant frequency (CF) component was compared with the frequency response characteristics of the animals's ear. The majority of "resting pulses' had CF components with the maximum frequency approximately 200 Hz below the best frequency (BF) of the CM audiogram. Doppler shift compensation occurred only during forward swings of the pendulum and in such a way that the echo CF components were always maintained near the BF, but on the low frequency slope of the CM audiogram. CM responses to emitted pulses were usually small in amplitude and in some animals no responses were seen. Echoes Doppler shifted upward, however, evoked high amplitude potentials. Echo CF components estimated to be at least 43 dB fainter than the emitted pulses evoked higher amplitude CM potentials than the loud emitted pulses. Echoes from large surfaces up to 4.5-5.0 meters away evoked CM potentials as high in amplitude as those elicited by emitted pulses, even when there was no Doppler shift. Beats in the CM were observed on many occasions and occurred as a result of pulse-echo and echo-echo interactions.
在蝙蝠帕氏叶鼻蝠（Pteronotus p. parnellii）被束缚飞行以及在摆锤上模拟飞行期间记录了耳蜗微音器（CM）电位。对于每个发出的信号，将约61 kHz恒频（CF）成分的频率与动物耳朵的频率响应特性进行比较。大多数“静息脉冲”的CF成分的最大频率比CM听力图的最佳频率（BF）低约200 Hz。多普勒频移补偿仅在摆锤向前摆动期间发生，并且以这样一种方式进行，即回声CF成分始终保持在BF附近，但处于CM听力图的低频斜率上。CM对发出脉冲的反应通常幅度较小，并且在一些动物中未观察到反应。然而，向上多普勒频移的回声会诱发高幅度电位。估计比发出脉冲至少弱43 dB的回声CF成分诱发的CM电位幅度高于响亮的发出脉冲。来自4.5 - 5.0米远的大表面的回声诱发的CM电位幅度与发出脉冲诱发的电位一样高，即使没有多普勒频移。在许多情况下观察到CM中的拍频，其是由脉冲 - 回声和回声 - 回声相互作用产生的。
