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Divergent Auditory Nerve Encoding Deficits Between Two Common Etiologies of Sensorineural Hearing Loss
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Modeling the Effect of Olivocochlear Efferents on the Subcortical Envelope Following Response in Humans
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Optimal Combination of Neural Temporal Envelope and Fine Structure Cues to Explain Speech Identification in Background Noise
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Abstract:
The dichotomy between acoustic temporal envelope (ENV) and fine structure (TFS) cues has stimulated numerous studies over the past decade to understand the relative role of acoustic ENV and TFS in human speech perception. Such acoustic temporal speech cues produce distinct neural discharge patterns at the level of the auditory nerve, yet little is known about the central neural mechanisms underlying the dichotomy in speech perception between neural ENV and TFS cues. We explored the question of how the peripheral auditory system encodes neural ENV and TFS cues in steady or fluctuating background noise, and how the central auditory system combines these forms of neural information for speech identification. We sought to address this question by (1) measuring sentence identification in background noise for human subjects as a function of the degree of available acoustic TFS information and (2) examining the optimal combination of neural ENV and TFS cues to explain human speech perception performance using computational models of the peripheral auditory system and central neural observers. Speech-identification performance by human subjects decreased as the acoustic TFS information was degraded in the speech signals. The model predictions best matched human performance when a greater emphasis was placed on neural ENV coding rather than neural TFS. However, neural TFS cues were necessary to account for the full effect of background-noise modulations on human speech-identification performance.
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Keyword:
Articles
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URL: https://doi.org/10.1523/JNEUROSCI.1025-14.2014
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4152611
http://www.ncbi.nlm.nih.gov/pubmed/25186758
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Modeling the Time-Varying and Level-Dependent Effects of the Medial Olivocochlear Reflex in Auditory Nerve Responses
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Sensorineural hearing loss amplifies neural coding of envelope information in the central auditory system of chinchillas
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Effects of sensorineural hearing loss on temporal coding of narrowband and broadband signals in the auditory periphery
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The use of confusion patterns to evaluate the neural basis for concurrent vowel identificationa
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Psychophysiological analyses demonstrate the importance of neural envelope coding for speech perception in noise
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Psychophysiological Analyses Demonstrate the Importance of Neural Envelope Coding for Speech Perception in Noise
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In: SFN (2011)
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Predicted effects of sensorineural hearing loss on across-fiber envelope coding in the auditory nervea
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Temporal coding in auditory-nerve fibers following noise-induced hearing loss
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In: Theses and Dissertations Available from ProQuest (2011)
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The role of envelope and temporal fine structure in the perception of noise degraded speech
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In: Theses and Dissertations Available from ProQuest (2010)
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