Long G R, Clark W W
J Acoust Soc Am. 1984 Apr;75(4):1184-90. doi: 10.1121/1.390768.
Thresholds for detection of frequency modulation were obtained from three chinchillas at seven frequencies between 320 Hz and 12.75 kHz and at three sensation levels (20, 40, 60, dB SL). These were compared with human thresholds at 40 dB SL obtained under the same conditions. Our data show no significant impact of sensation level and confirm Nelson and Kiester 's [J. Acoust. Soc. Am. 64, 114-126 (1978)] report that the chinchilla has much poorer frequency discrimination than man. In an attempt to assess separately the chinchilla's capacity for temporal coding of frequency, thresholds for detection of a change in the modulation rate of amplitude modulated noise were obtained for nine modulation frequencies between 10 and 320 Hz. The chinchillas needed a larger rate change for detection than most humans but the relative difference was less than that found for frequency modulation detection.
在320赫兹至12.75千赫兹之间的七个频率以及三种感觉水平（20、40、60分贝声级）下，从三只龙猫身上获取了频率调制检测阈值。将这些阈值与在相同条件下获得的40分贝声级时的人类阈值进行了比较。我们的数据显示感觉水平没有显著影响，并证实了纳尔逊和基斯特[《美国声学学会杂志》64, 114 - 126 (1978)]的报告，即龙猫的频率辨别能力比人类差得多。为了分别评估龙猫对频率进行时间编码的能力，在10至320赫兹之间的九个调制频率下，获取了检测调幅噪声调制率变化的阈值。与大多数人类相比，龙猫检测所需的速率变化更大，但相对差异小于在频率调制检测中发现的差异。
