Abstract
Absolute thresholds were measured for 5-, 30-, and 200-ms stimuli
using an adaptive, forced choice procedure. Temporal integration
of loudness for these durations was also measured for a 1-kHz tone
and for broadband noises over a range of 5-80 dB SL (noise) and
5-90 dB SL (tones). Results show that temporal integration
(defined as the level difference between equally loud 5- and
200-ms stimuli) varies non-monotonically with level. The temporal
integration is about 10-12 dB near threshold, increases to 18-19
dB when the 5-ms signal is about 56 dB SPL (tone) and 76 dB SPL
(noise), decreases again around 100 dB SPL to about 10 dB (tones)
and 13 dB (noise). The data for tones are in good agreement with
the majority of existing data. The data for noises are within the
range of the few previous data, but the effect of level differs
from that obtained in previous studies. The present results
indicate that the growth of loudness may, at least in part, be
consistent with the nonlinear input/output function of the basilar
membrane.
Original language | English |
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Journal | Acoustical Society of America. Journal |
Volume | 99 |
Issue number | 3 |
Pages (from-to) | 1633-1644 |
ISSN | 0001-4966 |
DOIs | |
Publication status | Published - 1996 |