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The role of temporal fine structure in masking, pitch and speech perception by normal and hearing-impaired people.| old_uid | 5313 |
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| title | The role of temporal fine structure in masking, pitch and speech perception by normal and hearing-impaired people. |
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| start_date | 2008/10/01 |
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| schedule | 10h30-12h |
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| online | no |
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| location_info | bât. ensiegnement, amphi à préciser |
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| summary | Complex broadband sounds are decomposed by the auditory filters into a series of relatively narrowband signals, each of which can be considered as a slowly varying envelope (E) superimposed on a more rapid temporal fine structure (TFS). E information is coded mainly by changes in neural firing rate over time, while TFS information is coded mainly in the patterns of neural phase locking. I will review the role played by TFS in masking, pitch perception and speech perception and concluded that cues derived from TFS play an important role for all three. TFS may be especially important for the ability to "listen in the dips" of fluctuating background sounds when detecting non-speech and speech signals. Evidence is reviewed suggesting that cochlear hearing loss reduces the ability to use TFS cues. The perceptual consequences of this, and reasons why it may happen, are discussed. |
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| responsibles | Grimault |
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