Interaural Intensity and Phase Angle Discrimination by Rhesus Monkeys Nine rhesus monkeys were trained to perform three auditory discriminations, which required that they press the right-hand key when the auditory stimulus is present in the right ear, and the left-hand key when the stimulus is presented to the left ear. Monaural thresholds for 18 ears averaged 14.7 dB SPL ... Research Article
Research Article  |   December 01, 1974
Interaural Intensity and Phase Angle Discrimination by Rhesus Monkeys
 
Author Affiliations & Notes
  • Jonathan G. Wegener
    Indiana University, Bloomington, Indiana
Article Information
Research Articles
Research Article   |   December 01, 1974
Interaural Intensity and Phase Angle Discrimination by Rhesus Monkeys
Journal of Speech, Language, and Hearing Research, December 1974, Vol. 17, 638-655. doi:10.1044/jshr.1704.638
History: Accepted April 30, 1973 , Received November 6, 1973
 
Journal of Speech, Language, and Hearing Research, December 1974, Vol. 17, 638-655. doi:10.1044/jshr.1704.638
History: Accepted April 30, 1973; Received November 6, 1973

Nine rhesus monkeys were trained to perform three auditory discriminations, which required that they press the right-hand key when the auditory stimulus is present in the right ear, and the left-hand key when the stimulus is presented to the left ear. Monaural thresholds for 18 ears averaged 14.7 dB SPL (range 9.6 to 22.0 dB). Interaural intensity difference thresholds for the same monkeys had a mean of 2.7 dB (range 1.8 to 3.7 dB). Interaural phase angle difference thresholds were determined for seven of the nine monkeys. The mean threshold was 9.7° (range 5.3° to 16.3°) equivalent to a temporal difference of 53 µsec (range 29 to 90 µsec).

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