Auditory Sensitivity of the Monkey

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Science  30 Sep 1966:
Vol. 153, Issue 3744, pp. 1646-1647
DOI: 10.1126/science.153.3744.1646-a


Auditory thresholds for pure tones were determined in monkeys (three Macaca irus and one Macaca nemestrina) by the psychophysical method of constant stimuli after the animals had been trained by operant conditioning procedures. Their audible frequency range was found to extend from below 60 hertz to 40 or 45 kilohertz.