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Effects of consonant-vowel transitions in speech stimuli on cortical auditory evoked potentials in adults.

Doellinger M, Burger M, Hoppe U, Bosco E, Eysholdt U - Open Neurol J (2011)

Bottom Line: Significant hemispheric asymmetries were found for speech but not in noise evoked potentials.The difference signals between the AEPs to speech and corresponding noise stimuli revealed a significant negative component, which correlated with the VOT.The correlation with the VOT indicates that the significant component in the difference signal reflects the perception of the acoustic change within the consonant-vowel transition.

View Article: PubMed Central - PubMed

Affiliation: Department of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Bohlenplatz 21, 91054 Erlangen, Germany.

ABSTRACT
We examined the neural activation to consonant-vowel transitions by cortical auditory evoked potentials (AEPs). The aim was to show whether cortical response patterns to speech stimuli contain components due to one of the temporal features, the voice-onset time (VOT). In seven normal-hearing adults, the cortical responses to four different monosyllabic words were opposed to the cortical responses to noise stimuli with the same temporal envelope as the speech stimuli. Significant hemispheric asymmetries were found for speech but not in noise evoked potentials. The difference signals between the AEPs to speech and corresponding noise stimuli revealed a significant negative component, which correlated with the VOT. The hemispheric asymmetries can be referred to rapid spectral changes. The correlation with the VOT indicates that the significant component in the difference signal reflects the perception of the acoustic change within the consonant-vowel transition. Thus, at the level of automatic processing, the characteristics of speech evoked potentials appear to be determined primarily by temporal aspects of the eliciting stimuli.

No MeSH data available.


Spectral view of the presented stimuli. Top: Natural spoken monosyllabic words. Bottom: Synthetic noise sounds, derived from the monosyllabic words. Bandwidth of the stimuli is 8 kHz.
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Figure 2: Spectral view of the presented stimuli. Top: Natural spoken monosyllabic words. Bottom: Synthetic noise sounds, derived from the monosyllabic words. Bandwidth of the stimuli is 8 kHz.

Mentions: Spectrograms of all presented stimuli are depicted in Fig. (2). The speech stimuli mainly consisted of frequencies lower than 2 kHz, whereas the noise stimuli were distributed over the entire bandwidth of 8 kHz.


Effects of consonant-vowel transitions in speech stimuli on cortical auditory evoked potentials in adults.

Doellinger M, Burger M, Hoppe U, Bosco E, Eysholdt U - Open Neurol J (2011)

Spectral view of the presented stimuli. Top: Natural spoken monosyllabic words. Bottom: Synthetic noise sounds, derived from the monosyllabic words. Bandwidth of the stimuli is 8 kHz.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3106335&req=5

Figure 2: Spectral view of the presented stimuli. Top: Natural spoken monosyllabic words. Bottom: Synthetic noise sounds, derived from the monosyllabic words. Bandwidth of the stimuli is 8 kHz.
Mentions: Spectrograms of all presented stimuli are depicted in Fig. (2). The speech stimuli mainly consisted of frequencies lower than 2 kHz, whereas the noise stimuli were distributed over the entire bandwidth of 8 kHz.

Bottom Line: Significant hemispheric asymmetries were found for speech but not in noise evoked potentials.The difference signals between the AEPs to speech and corresponding noise stimuli revealed a significant negative component, which correlated with the VOT.The correlation with the VOT indicates that the significant component in the difference signal reflects the perception of the acoustic change within the consonant-vowel transition.

View Article: PubMed Central - PubMed

Affiliation: Department of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Bohlenplatz 21, 91054 Erlangen, Germany.

ABSTRACT
We examined the neural activation to consonant-vowel transitions by cortical auditory evoked potentials (AEPs). The aim was to show whether cortical response patterns to speech stimuli contain components due to one of the temporal features, the voice-onset time (VOT). In seven normal-hearing adults, the cortical responses to four different monosyllabic words were opposed to the cortical responses to noise stimuli with the same temporal envelope as the speech stimuli. Significant hemispheric asymmetries were found for speech but not in noise evoked potentials. The difference signals between the AEPs to speech and corresponding noise stimuli revealed a significant negative component, which correlated with the VOT. The hemispheric asymmetries can be referred to rapid spectral changes. The correlation with the VOT indicates that the significant component in the difference signal reflects the perception of the acoustic change within the consonant-vowel transition. Thus, at the level of automatic processing, the characteristics of speech evoked potentials appear to be determined primarily by temporal aspects of the eliciting stimuli.

No MeSH data available.