Complex Auditory Signals
Annual rept. 14 Apr 1989-15 Apr 1990
FLORIDA UNIV GAINESVILLE DEPT OF PSYCHOLOGY
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Efforts to understand the perception of complex auditory stimuli produced four different research undertakings. Studies have been done both with computer simulations and human listeners, the most precise psychophysical procedure to estimate a discrimination threshold. A technique to determine the listeners sensitivity to synchrony was perfected in envelope modulation produced at two separate regions, and have measured such sensitivity using a variety of different stimulus parameters. Sensitivity to modulation synchrony is essentially independent of the locus of the two frequency bands. Studies have also been done on temporal factors that influence the ability to discriminate an increment in the level of a single component of a multi-tonal complex. Very slight differences in the temporal onset 20 msec. of tone and complex strongly influence the ability to make such discrimination even when the entire stimulus lasts 500 msec. Finally, we continue to study the estimates of spectral weights used in such intensity discrimination tasks, using the COSS analysis. Keywords Psychoacoustics.
- Voice Communications