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Talker Versus Dialect Effects on Speech Intelligibility: A Symmetrical Study.

Daniel R McCloy, Richard A Wright, Pamela E Souza

    Language and Speech
    |November 5, 2015
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    Summary
    This summary is machine-generated.

    Speech intelligibility is subtly affected by talker dialect, even when acoustic features are considered. This finding impacts understanding of cross-dialect communication and speech perception.

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    Area of Science:

    • Phonetics
    • Speech Science
    • Linguistics

    Background:

    • Speech intelligibility is crucial for effective communication.
    • Understanding factors influencing cross-dialect intelligibility is an ongoing research area.
    • Talker-specific and dialect-based variations can impact how easily speech is understood.

    Purpose of the Study:

    • To investigate the distinct contributions of talker-specific and dialect-based variations to speech intelligibility.
    • To determine if dialect significantly affects speech intelligibility in noise, beyond individual talker differences.
    • To explore the relationship between acoustic measures and cross-dialect intelligibility.

    Main Methods:

    • Participants from two American English dialects completed speech-in-noise tasks.
    • Sentences were produced by talkers from both dialects.
    • Statistical and mixed-effects regression models were employed, incorporating acoustic measures.

    Main Results:

    • Initial analysis showed no significant effect of talker or listener dialect on intelligibility.
    • A subsequent mixed-effects model revealed a subtle, yet significant, effect of talker dialect after accounting for acoustic variables.
    • Acoustic dimensions partially explained the influence of dialect on intelligibility.

    Conclusions:

    • Dialect exerts a subtle influence on speech intelligibility, independent of general talker variability.
    • Acoustic properties of speech are key to understanding the impact of dialect on intelligibility.
    • Findings contribute to the broader understanding of cross-dialect speech perception and acoustic phonetics.