Seminars in Hearing Research at Purdue (SHRP), Thurs., March 30
Event Date: | March 30, 2023 |
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Hosted By: | Hearing Research at Purdue |
Time: | 10:30 a.m. |
Location: | LYLE 1150 and via Zoom |
Priority: | No |
School or Program: | Non-Engineering |
College Calendar: | Show |
Abstract: Schroeder-phase complexes are stimuli that contain multiple harmonic frequency components of equal amplitude but variable starting phase, summing to produce a series of periodic linear frequency sweeps. Classic psychoacoustic studies find that upwards swept Schroeder-phase maskers are more effective maskers of tonal signals than downwards swept Schroeder-phase maskers. The psychoacoustic literature on Schroeder-phase masking interprets the dependence on sweep direction as arising not primarily from suppression, but from cochlear dispersion (phase curvature), an interpretation supported by animal measurements and physiological models. The current study investigates the effects of sweep rate and direction in normal hearing humans, both behaviorally and physiologically. For the psychoacoustic experiments, detection thresholds for tonal signals masked by upward and downward sweeps are measured as a function of sweep rate and direction. In the same subjects, stimulus-frequency otoacoustic emissions (SFOAEs) at the tone frequency are recorded using the sweep combinations from the psychoacoustic paradigm as suppressors. To the extent that the two phenomena share common generation mechanisms, we expect behavioral masking and OAE suppression to depend similarly on sweep characteristics.
This year’s SHRP schedule is available here: https://purdue.edu/TPAN/hearing/shrp_schedule
Titles and abstracts of all SHRP talks are here: https://purdue.edu/TPAN/hearing/shrp_abstracts
Zoom link: https://purdue-edu.zoom.us/j/4326340458 MEETINGID:4326340458
2023-03-30 10:30:00 2023-03-30 11:30:00 America/Indiana/Indianapolis Seminars in Hearing Research at Purdue (SHRP), Thurs., March 30 William Salloom, Postdoctoral Fellow, USC Keck School of Medicine will present "Human Cochlear Masking and OAE Suppression Measured Using Dynamic Stimuli" as part of the Seminars in Hearing Research at Purdue on Thursday, March 30, 10:30 a.m., in LYLE 1150 and via Zoom. LYLE 1150 and via Zoom