Effects of stimulus level on coritical auditory event-related potentials evoked by speech

Angela C. Garinis; Barbara K. Cone-Wesson

doi:10.3766/jaaa.18.2.3

Effects of stimulus level on coritical auditory event-related potentials evoked by speech

Angela C. Garinis, Barbara K. Cone-Wesson

Speech Language and Hearing Sciences

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The effect of stimulus level on cortical auditory event-related potentials (ERPs) evoked by consonant-vowel (CV) contrasts, /ta/, /da/, and /sa/, was investigated. The lowest level at which CVs were discriminated with >95% accuracy was determined for 15 normally hearing adults. ERPs were obtained at 0, 20, and 40 dB SL above this level during active listening. ERP latencies decreased as level increased. P₃₀₀ amplitude did not vary with CV level or type; however, obligatory ERPs decreased in amplitude as level increased. The effect of level on P₃₀₀ latency is likely related to the cognitive processing speed needed to perform speech discrimination. Obligatory ERP amplitude results suggest that attention demands vary with level during discrimination of speech features.

Original language	English (US)
Pages (from-to)	107-116
Number of pages	10
Journal	Journal of the American Academy of Audiology
Volume	18
Issue number	2
DOIs	https://doi.org/10.3766/jaaa.18.2.3
State	Published - Feb 2007

Keywords

Adults
Event-related potentials
P300
Stimulus effects

ASJC Scopus subject areas

Speech and Hearing

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10.3766/jaaa.18.2.3

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abstract = "The effect of stimulus level on cortical auditory event-related potentials (ERPs) evoked by consonant-vowel (CV) contrasts, /ta/, /da/, and /sa/, was investigated. The lowest level at which CVs were discriminated with >95% accuracy was determined for 15 normally hearing adults. ERPs were obtained at 0, 20, and 40 dB SL above this level during active listening. ERP latencies decreased as level increased. P300 amplitude did not vary with CV level or type; however, obligatory ERPs decreased in amplitude as level increased. The effect of level on P300 latency is likely related to the cognitive processing speed needed to perform speech discrimination. Obligatory ERP amplitude results suggest that attention demands vary with level during discrimination of speech features.",

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AU - Cone-Wesson, Barbara K.

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AB - The effect of stimulus level on cortical auditory event-related potentials (ERPs) evoked by consonant-vowel (CV) contrasts, /ta/, /da/, and /sa/, was investigated. The lowest level at which CVs were discriminated with >95% accuracy was determined for 15 normally hearing adults. ERPs were obtained at 0, 20, and 40 dB SL above this level during active listening. ERP latencies decreased as level increased. P300 amplitude did not vary with CV level or type; however, obligatory ERPs decreased in amplitude as level increased. The effect of level on P300 latency is likely related to the cognitive processing speed needed to perform speech discrimination. Obligatory ERP amplitude results suggest that attention demands vary with level during discrimination of speech features.

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Effects of stimulus level on coritical auditory event-related potentials evoked by speech

Abstract

Keywords

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