Journal
AUDIOLOGY AND NEURO-OTOLOGY
Volume 11, Issue 4, Pages 213-232Publisher
KARGER
DOI: 10.1159/000092589
Keywords
envelope following responses; auditory steady state responses; evoked potentials; speech perception; Fourier analyzer
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Envelope following responses to natural vowels were recorded in 10 normal hearing people. Responses were recorded to individual vowels (/a/, /i/, /u/) with a relatively steady pitch, to /8/ with a variable and steady pitch, and to a multivowel stimulus (/Lambda ui/) with a steady pitch. Responses were analyzed using a Fourier analyzer, so that recorded responses could follow the changes in the pitch. Significant responses were detected for all subjects to /a/, /i/ and /u/ with the time required to detect a significant response ranging from 6 to 66 s ( average time: 19 s). Responses to /Lambda/ and /Lambda ui/ were detected in all subjects, but took longer to demonstrate ( average time: 73 s). These results support the use of a Fourier analyzer to measure envelope following responses to natural speech. Copyright (C) 2006 S. Karger AG, Basel.
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