Charlotte M. Reed
Ph.D.Senior Research Scientist
Research Laboratory of Electronics
Massachusetts Institute of Technology
Wednesday, October 7, 2009Time: 4:00 p.m.Location: IU Speech & Hearing Center, Room C141This presentation is part of an Advanced Knowledge Seminar funded by the IU Institute for Advanced Study.
Comparisons of performance between normal-hearing (NH) and hearing-impaired (HI) listeners are intrinsically complicated by the difference in absolute thresholds between the two groups. One approach towards making more valid comparisons between NH and HI listeners is through the use of functional simulations of hearing loss in which stimuli are equated for both sound-pressure level and sensation level in both groups of listeners. This talk will present an overview of a research program using hearing-loss simulation to examine the role of threshold elevation and audibility in the speech-reception and psychoacoustic abilities of HI listeners. The hearing-loss simulation paradigm employs a combination of spectrally-shaped masking noise and multi-band expansion which is applied to stimuli presented to NH listeners. The research includes a study of the release of masking for speech using interrupted versus continuous noise backgrounds, as well as a variety of psychoacoustic measurements addressed towards understanding these results.
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