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Phonemic restoration and its limitations| old_uid | 11874 |
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| title | Phonemic restoration and its limitations |
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| start_date | 2012/11/26 |
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| schedule | 14h |
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| online | no |
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| location_info | Amphi G2 |
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| details | CRNL-CAP |
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| summary | Inaudible parts of speech can be perceptually restored with the help of linguistic knowledge, context, and expectations. This top-down repair mechanism, phonemic restoration, is considered to enhance speech intelligibility in noisy environments. Hearing-impaired listeners and users of cochlear implants commonly complain about not understanding speech in noise. In our research, we observe that hearing impairment and front-end processing of hearing aids and cochlear implants may reduce the benefit from restoration. Based on this observation, we hypothesize that the degradations in the bottom-up speech signals due to the hearing impairment or signal processing may have a negative effect on the top-down repair mechanism, which could partially be responsible for the complaints by this population. We test this hypothesis in a number of studies with either control groups of normal hearing (with or without simulations of hearing impairment) or with hearing-impaired participants. In this talk, I will present results from these studies. Overall findings from our laboratory imply that the degradations in the bottom-up signals alone (such as in hearing impairment) may reduce the top-down restoration of speech, even in the absence of cognitive deficits. |
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| responsibles | Béranger, Rossetti |
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