AUDITORY PULSED DOPPLER DISCRIMINATION

Detection and relative discrimination thresholds were determined for auditory pulsed Doppler sequences. Doppler thresholds rival the extremely acute interval, or pitch, thresholds of the ear. Doppler threshold changes of less than 1 Ȋ¼sec/interval are readily obtained. Doppler thresholds suffer when temporal uncertainty, or jitter, is introduced, especially at high pulse frequencies. An attempt was made to obtain a â€æpure†measure of auditory interval gradient discrimination. Under experimental procedures that lessen the contribution of component variables, auditory interval gradient discrimination is relatively poor: interval gradient thresholds of about 25% compare with pulse number thresholds of about 10%, and with interpulse interval thresholds of about 0.1%. © 1968, Acoustical Society of America. All rights reserved.