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Fundamental frequency patterns during spontaneous picture description.

S W Anderson, W E Cooper

    The Journal of the Acoustical Society of America
    |April 1, 1986
    PubMed
    Summary
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    Fundamental voice frequency (F0) declination occurs in spontaneous sentences, similar to read speech. This pitch pattern is typical for isolated sentences, not extended passages, in both speaking modes.

    Area of Science:

    • Linguistics
    • Phonetics
    • Speech Science

    Background:

    • Fundamental voice frequency (F0) declination is a known phenomenon in read speech.
    • Its occurrence in spontaneous speech, particularly in isolated sentences, requires further investigation.

    Purpose of the Study:

    • To determine if F0 declination occurs in spontaneously produced sentences.
    • To compare F0 declination patterns in spontaneous versus read sentences.

    Main Methods:

    • A picture description task elicited spontaneous sentences.
    • Speakers also read aloud matched sentences.
    • F0 was analyzed for declination patterns in both speech modes.

    Main Results:

    • F0 declination was reliably observed in both spontaneous and read isolated sentences (one- and two-clause).

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  • No significant differences were found in declination slopes between spontaneous and read speech.
  • Declination appears characteristic of isolated sentences, irrespective of speech mode.

    • Conclusions:

    • F0 declination is not exclusive to read speech and occurs in spontaneous sentences.
    • The findings suggest declination is a feature of isolated utterances, not lengthy passages, in both spontaneous and read speech.