Acoustic and Perceptual Effects of Left-Right Laryngeal Asymmetries Based on Computational Modeling

Autor/inn/en	Samlan, Robin A.; Story, Brad H.; Lotto, Andrew J.; Bunton, Kate
Titel	Acoustic and Perceptual Effects of Left-Right Laryngeal Asymmetries Based on Computational Modeling
Quelle	In: Journal of Speech, Language, and Hearing Research, 57 (2014) 5, S.1619-1637 (19 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2014_JSLHR-S-12-0405
Schlagwörter	Acoustics; Human Body; Listening; Auditory Perception; Vowels; Mathematical Models; Computation + Suchen Sie Ihr Suchwort? Akustik; Menschlicher Körper; Hörvorgang; Zuhören; Auditive Wahrnehmung; Akustische Wahrnehmung; Mathematical model; Mathematisches Modell
Abstract	Purpose: Computational modeling was used to examine the consequences of 5 different laryngeal asymmetries on acoustic and perceptual measures of vocal function. Method: A kinematic vocal fold model was used to impose 5 laryngeal asymmetries: adduction, edge bulging, nodal point ratio, amplitude of vibration, and starting phase. Thirty /a/ and /?/ vowels were generated for each asymmetry and analyzed acoustically using cepstral peak prominence (CPP), harmonics-to-noise ratio (HNR), and 3 measures of spectral slope (H1-H2, B0-B1, and B0-B2). Twenty listeners rated voice quality for a subset of the productions. Results: Increasingly asymmetric adduction, bulging, and nodal point ratio explained significant variance in perceptual rating (R[superscript 2] = 0.05, p < 0.001). The same factors resulted in generally decreasing CPP, HNR, and B0-B2 and in increasing B0-B1. Of the acoustic measures, only CPP explained significant variance in perceived quality (R[superscript 2] = 0.14, p < 0.001). Increasingly asymmetric amplitude of vibration or starting phase minimally altered vocal function or voice quality. Conclusion: Asymmetries of adduction, bulging, and nodal point ratio drove acoustic measures and perception in the current study, whereas asymmetric amplitude of vibration and starting phase demonstrated minimal influence on the acoustic signal or voice quality. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10