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Acoustic correlates of nasopharyngea...

Scheer, Alison R.

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Acoustic correlates of nasopharyngeal resonance.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Acoustic correlates of nasopharyngeal resonance./
Author:	Scheer, Alison R.
Description:	115 p.
Notes:	Adviser: Raymond D. Kent.
Contained By:	Dissertation Abstracts International67-09B.
Subject:	Health Sciences, Speech Pathology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3234550
ISBN:	9780542883095

Acoustic correlates of nasopharyngeal resonance.
Scheer, Alison R.

Acoustic correlates of nasopharyngeal resonance. - 115 p.

Adviser: Raymond D. Kent.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2006.

Despite considerable effort to date, perceptual ratings of inappropriate resonance in childhood speech disorders lack reliability. The goal of this study is to investigate acoustic correlates of a descriptive feature of resonance---inconsistent resonance or oral-nasal gestures perceived as nasopharyngeal resonance (Shriberg, Kwiatkowski, & Rasmussen, 1990). Specifically, the correlation between acoustic correlates of nasalization and perceptual judgments of nasal, denasal, and nasopharyngeal resonance is explored. To this end, speech and voice characteristics were compared for 64 children, using perceptual and acoustic methods. The following groups were included in this study: 16 children classified as having nasal resonance (10 boys and 6 girls; 4.3 years to 14.7 years of age); 16 children classified as having denasal resonance (10 boys and 6 girls; 4.5 years to 14.1 years of age); 16 children classified as having nasopharyngeal resonance (10 boys and 6 girls; 4.5 years to 14.9 years of age); and 16 children classified as having appropriate resonance (10 boys and 6 girls; 4.4 years to 14.9 years of age).

ISBN: 9780542883095Subjects--Topical Terms:

1018105
Health Sciences, Speech Pathology.

Acoustic correlates of nasopharyngeal resonance.
LDR:03330nam 2200289 a 45 001 972260
005 20110927
008 110927s2006 eng d
020 $a 9780542883095
035 $a (UMI)AAI3234550
035 $a AAI3234550
040 $a UMI $c UMI
100 1 $a Scheer, Alison R. $3 1296275
245 1 0 $a Acoustic correlates of nasopharyngeal resonance.
300 $a 115 p.
500 $a Adviser: Raymond D. Kent.
500 $a Source: Dissertation Abstracts International, Volume: 67-09, Section: B, page: 5032.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2006.
520 $a Despite considerable effort to date, perceptual ratings of inappropriate resonance in childhood speech disorders lack reliability. The goal of this study is to investigate acoustic correlates of a descriptive feature of resonance---inconsistent resonance or oral-nasal gestures perceived as nasopharyngeal resonance (Shriberg, Kwiatkowski, & Rasmussen, 1990). Specifically, the correlation between acoustic correlates of nasalization and perceptual judgments of nasal, denasal, and nasopharyngeal resonance is explored. To this end, speech and voice characteristics were compared for 64 children, using perceptual and acoustic methods. The following groups were included in this study: 16 children classified as having nasal resonance (10 boys and 6 girls; 4.3 years to 14.7 years of age); 16 children classified as having denasal resonance (10 boys and 6 girls; 4.5 years to 14.1 years of age); 16 children classified as having nasopharyngeal resonance (10 boys and 6 girls; 4.5 years to 14.9 years of age); and 16 children classified as having appropriate resonance (10 boys and 6 girls; 4.4 years to 14.9 years of age).
520 $a Acoustic correlates of nasopharyngeal resonance were chosen from the literature on the acoustic analysis of nasalized vowels and pharyngeal consonants. Corner vowels (/i/, /ae/, /u/, /a/) from monosyllabic content words produced by the participants in conversational speech were acoustically analyzed. Values for the following twelve acoustic variables were obtained: frequency (kHz) and amplitude (dB) of the first, second, and third formants, extra resonance, antiformant, and trough.
520 $a The means of the four vowel types were calculated per subject and analyzed separately due to the inherent acoustic differences for each corner vowel. The current findings were limited to few statistically significant acoustic correlates of nasopharyngeal resonance associated with vowel type. Specifically, significant differences were obtained for first formant frequencies during production of /u/ when comparing nasopharyngeal with nasal or denasal resonance and significant differences in first formant frequency (vowel /i/) and amplitude of the trough (vowel /a/) for the comparison of nasopharyngeal with denasal resonance. Several trends were also noted based on the direction and magnitude of the effect sizes. The results of this study provide preliminary support for acoustic correlates that differentiate inappropriate resonance.
590 $a School code: 0262.
650 4 $a Health Sciences, Speech Pathology. $3 1018105
690 $a 0460
710 2 0 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 67-09B.
790 $a 0262
790 1 0 $a Kent, Raymond D., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3234550