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Related Experiment Videos

Locus of selective adaptation in speech perception.

D G Jamieson, M F Cheesman

    Journal of Experimental Psychology. Human Perception and Performance
    |August 1, 1986
    PubMed
    Summary

    Voiced and voiceless consonant perception involves distinct auditory pathways. Voiceless sounds are processed centrally and ear-independently, while voiced sounds are processed peripherally and ear-specifically.

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    Area of Science:

    • Auditory Neuroscience
    • Speech Perception
    • Psychoacoustics

    Background:

    • The human auditory system processes complex acoustic cues to differentiate speech sounds.
    • Voiced and voiceless consonants, differentiated by voice-onset time (VOT), are fundamental phonetic distinctions.

    Purpose of the Study:

    • To investigate the neural processing locus and characteristics of voiced versus voiceless consonant adaptation.
    • To determine if auditory adaptation effects for VOT continua differ in ear-specificity and duration.

    Main Methods:

    • Utilized selective adaptation paradigms with voiced (/ba/, /da/) and voiceless (/pa/, /ta/) consonant stimuli along a voice-onset-time continuum.
    • Measured adaptation effects across different time delays and ear presentations.

    Main Results:

    • Voiceless consonant adaptation was largely ear-independent and persisted for over 1 minute.
    • Voiced consonant adaptation was highly ear-specific and transient, lasting less than 15 seconds.

    Conclusions:

    • Distinct auditory mechanisms process voiced and voiceless consonant cues.
    • Voiced consonant processing involves peripheral, ear-specific mechanisms, whereas voiceless consonant processing relies on central, ear-independent mechanisms.

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