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Full-Text Articles in Speech and Hearing Science
Multi-Frequency Electrophysiological Estimates Of Auditory Temporal Acuity, Negar Ahzan
Multi-Frequency Electrophysiological Estimates Of Auditory Temporal Acuity, Negar Ahzan
Electronic Thesis and Dissertation Repository
Auditory temporal acuity, a listener’s ability to discriminate rapid changes in the envelope of an auditory signal over time, is crucial for understanding speech. Electrophysiological measurement of auditory temporal acuity is beneficial when we cannot achieve reliable behavioural responses. The envelope following response (EFR) evoked by a changing (swept) amplitude-modulated (AM) stimulus is significantly correlated with behavioural measures of temporal acuity in humans. Previous research using AM broadband noise carriers may have been affected by the cancellation of evoked potentials at the measurement electrodes due to out-of-phase interference of parallel responses initiated at different times due to cochlear travelling wave …
It’S All About Context: Investigating The Effects Of Consonant And Vowel Environment On Vowel-Evoked Envelope Following Responses, Emma Bridgwater
It’S All About Context: Investigating The Effects Of Consonant And Vowel Environment On Vowel-Evoked Envelope Following Responses, Emma Bridgwater
Electronic Thesis and Dissertation Repository
The envelope following response (EFR) has proven useful for studying brainstem speech processing. Previous work, however, demonstrates that its amplitude varies across stimuli. This thesis investigates whether this variation is attributable to the consonant or vowel context of the stimulus, or some interaction of the two. Experiment 1 evoked EFRs in 30 participants using seven English vowels embedded in four CVC environments. A strong effect of vowel and a minor effect of consonant on EFR amplitude were found. In Experiment 2, 64 listeners heard four different tokens of one of four possible English vowels (16 participants/vowel), embedded in the same …