Toward a quantitative account of pitch distribution in spontaneous narrative: method and validation
| Autor: | Gloria Streit Olness, Nancy J. Caplow, Samuel E. Matteson |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Asymmetric Laplace distribution
Adult Male Sound Spectrography Time Factors Acoustics and Ultrasonics Voice Quality Acoustics Emotions Probability density function Speech Acoustics Musical acoustics Gamut Arts and Humanities (miscellaneous) Speech Production Measurement Phonetics Humans Speech Production [70] Mathematics Aged Pitch interval Mode (statistics) Age Factors Signal Processing Computer-Assisted Middle Aged Black or African American Interval (music) Female Algorithm Algorithms Pitch (Music) |
| Zdroj: | The Journal of the Acoustical Society of America. 133(5) |
| ISSN: | 1520-8524 |
| Popis: | Pitch is well-known both to animate human discourse and to convey meaning in communication. The study of the statistical population distributions of pitch in discourse will undoubtedly benefit from methodological improvements. The current investigation examines a method that parameterizes pitch in discourse as musical pitch interval H measured in units of cents and that disaggregates the sequence of peak word-pitches using tools employed in time-series analysis and digital signal processing. The investigators test the proposed methodology by its application to distributions in pitch interval of the peak word-pitch (collectively called the discourse gamut) that occur in simulated and actual spontaneous emotive narratives obtained from 17 middle-aged African-American adults. The analysis, in rigorous tests, not only faithfully reproduced simulated distributions imbedded in realistic time series that drift and include pitch breaks, but the protocol also reveals that the empirical distributions exhibit a common hidden structure when normalized to a slowly varying mode (called the gamut root) of their respective probability density functions. Quantitative differences between narratives reveal the speakers' relative propensity for the use of pitch levels corresponding to elevated degrees of a discourse gamut (the “e-la”) superimposed upon a continuum that conforms systematically to an asymmetric Laplace distribution. |
| Databáze: | OpenAIRE |
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