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Indian Journal of Otolaryngology and Head & Neck Surgery

Published in:

01-10-2010 | Original Article

Speech Evoked Auditory Brainstem Responses: A New Tool to Study Brainstem Encoding of Speech Sounds

Authors: Sujeet Kumar Sinha, Vijayalakshmi Basavaraj

Published in: Indian Journal of Otolaryngology and Head & Neck Surgery | Issue 4/2010

Abstract

The neural encoding of speech sound begins in the auditory nerve and travels to the auditory brainstem. Non speech stimuli such as click or tone bursts stimulus are used to check the auditory neural integrity routinely. Recently Speech evoked Auditory Brainstem measures (ABR) are being used as a tool to study the brainstem processing of Speech sounds. The aim of the study was to study the Speech evoked ABR to a consonant vowel (CV) stimulus. 30 subjects with normal hearing participated for the study. Speech evoked ABR were measured to a CV stimulus in all the participants. The speech stimulus used was a 40 ms synthesized/da/sound. The consonant and vowel portion was analysed separately. Speech evoked ABR was present in all the normal hearing subjects. The consonant portion of the stimulus elicited peak V in response waveform. Response to the vowel portion elicited a frequency following response (FFR). The FFR further showed a coding of the fundamental frequency (F0) and the first formant frequency (F1). The results of the present study throw light on the processing of speech in brainstem. The understanding of speech evoked ABR has other applications both in research as well as in clinical purposes. Such understanding is specially important if one is interested in studying the central auditory system function.

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Title: Speech Evoked Auditory Brainstem Responses: A New Tool to Study Brainstem Encoding of Speech Sounds
Authors: Sujeet Kumar Sinha
Vijayalakshmi Basavaraj
Publication date: 01-10-2010
Publisher: Springer-Verlag
Published in: Indian Journal of Otolaryngology and Head & Neck Surgery / Issue 4/2010
Print ISSN: 2231-3796
Electronic ISSN: 0973-7707
DOI: https://doi.org/10.1007/s12070-010-0100-y

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Speech Evoked Auditory Brainstem Responses: A New Tool to Study Brainstem Encoding of Speech Sounds

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