FUNDAMENTAL FREQUENCY AND DURATIONAL DIFFERENCES BETWEEN LEXICALLY IDENTICAL READ AND SPONTANEOUS UTTERANCES.
Item
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Title
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FUNDAMENTAL FREQUENCY AND DURATIONAL DIFFERENCES BETWEEN LEXICALLY IDENTICAL READ AND SPONTANEOUS UTTERANCES.
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Identifier
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AAI8222923
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identifier
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8222923
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Creator
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ASTON, CARLETTA HAMILTON.
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Contributor
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Katherine Harris
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Date
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1982
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Language
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English
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Publisher
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City University of New York.
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Subject
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Health Sciences, Speech Pathology
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Abstract
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The present investigation was concerned with listener's ability to distinguish between lexically identical spontaneous and read utterances which had been excised from half-hour conversational connected discourse samples for three speakers--two male and one female. The roles of fundamental frequency and duration in the spontaneous/read distinction were examined through a perceptual task and through an analysis of selected acoustic measurements.;The excised utterances, which had undergone Linear Predictive Coding analysis, were altered by having their fundamental frequency contours flattened through computer manipulation techniques. In a single utterance presentation format, listeners heard read and spontaneous versions of each of the utterances under unaltered and altered conditions. They were required to judge whether each utterance appeared to have been read or to have been produced spontaneously. Results of this perceptual task indicated that fundamental frequency is a primary cue used by listeners in making the spontaneous/read distinction.;Three temporal measurements were made--overall duration of utterances, length of the utterance final syllable, and the duration of stressed and unstressed syllables in bisyllabic words. Selected fundamental frequency measurements made--fundamental frequency range, average fundamental frequency, a quantitative measurement of declination, and a quantitative measurement of peak movement throughout the fundamental frequency range. Direction of slope of the fundamental frequency contours was specified. The spontaneous and read versions of the utterances were compared for each of these variables. Results of the analysis of acoustic measurements suggest that not all utterances are marked for the spontaneous/read distinction. For those that are marked fundamental frequency appears to be the primary cue. The specific fundamental frequency variables which differ between speaking modes appear to be idiosyncratic. For both read and spontaneous versions there were a significant number of utterances that did not display declination, but rather had flat or rising fundamental frequency contours.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Speech and Hearing Sciences
