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- W2024610247 abstract "Sensorineural hearing loss (SNHL) produces a loss of frequency selectivity and elevated thresholds in the auditory periphery. Broadened cochlear tuning significantly affects magnitude and phase responses of auditory filters and thus can change cochlear-response timing. The present study compared auditory-filter characteristics in normal-hearing and noise-exposed anesthetized chinchillas. Impulse responses of auditory filters were derived from responses of auditory-nerve fibers to broadband noise using spike-triggered averaging techniques. Frequency modulations (or frequency glides) in impulse responses were quantified by computing instantaneous frequencies from impulse-response zero crossings. Group delays for individual auditory filters were computed from phase-frequency responses. Cochlear traveling-wave delays were estimated from shuffled cross-correlograms. Preliminary results suggest that auditory-filter best frequency shifts apically following SNHL. Latencies of impulse responses and traveling-wave delays were much shorter following noise exposure. For normal-hearing fibers, frequency glides in impulse responses increased as a function of time for high characteristic-frequency (CF) fibers and decreased for low-CF fibers, consistent with previous studies. SNHL significantly affected frequency glides of noise-exposed fibers in a manner consistent with the loss of tonotopicity. These characterizations of impaired auditory filters have important implications for SNHL effects on temporal and spatiotemporal coding of complex sounds, such as speech. [Work supported by NIH Grant No. R01DC009838.]" @default.
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- W2024610247 date "2011-04-01" @default.
- W2024610247 modified "2023-09-23" @default.
- W2024610247 title "Filter characteristics derived from auditory-nerve fiber responses following noise-induced hearing loss." @default.
- W2024610247 doi "https://doi.org/10.1121/1.3588860" @default.
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