Heffner R S, Heffner H E
Department of Psychology, University of Toledo, Ohio 43606.
Hear Res. 1991 Mar;52(1):13-6. doi: 10.1016/0378-5955(91)90183-a.
The audiograms of three chinchillas were determined using pure tones ranging from 32 Hz to 45 kHz. The animals were tested with a conditioned avoidance procedure in which their heads were fixed within the sound field by requiring them to place their mouths on a water spout. At a level of 60 dB SPL the average hearing range extended from 50 Hz to 33 kHz with none of the animals able to hear 45 kHz at 89 dB. Overall, the audiogram of the chinchilla appears to resemble the human audiogram more closely than do other rodent audiograms. An analysis of ten published chinchilla audiograms indicates that those procedures which do not fix an animal within the sound field may overestimate their sensitivity.
使用32赫兹至45千赫兹的纯音测定了三只龙猫的听力图。通过条件性回避程序对动物进行测试，在该程序中，要求它们将嘴放在喷水口上，从而将其头部固定在声场中。在60分贝声压级的水平下，平均听力范围从50赫兹扩展到33千赫兹，没有一只动物能够在89分贝时听到45千赫兹的声音。总体而言，龙猫的听力图似乎比其他啮齿动物的听力图更接近人类的听力图。对十份已发表的龙猫听力图的分析表明，那些没有将动物固定在声场中的程序可能会高估它们的灵敏度。
