Threshold vs duration for Gaussian-shaped tone-pips of one to four periods duration.
Detection thresholds were obtained for Gaussian-shaped tone-pips of 1, 2, 3, or 4 periods duration for 20 frequencies spanning 50-3,000 Hz, in quiet, and in high-pass noise, for a single exceptionally patient and experienced listener. Thresholds were fitted by straight lines in decibels SPL versus the logarithm of duration. Slopes fell into 3 distinct regimes of frequency-dependence under both listening conditions. Models of Garner and of Formby, et al. do not account for this relation.
Nizami
Lance
L
Center for Hearing Research, Boys Town National Research Hospital, Omaha, NE 68131, USA. nizamii2@aol.com
D001307:Auditory Perception; D001309:Auditory Threshold / Q000502:physiology*; D006801:Humans; D016011:Normal Distribution; D017603:Signal Detection, Psychological; D013997:Time Factors