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Use of Spectral/Cepstral Analyses for Differentiating Normal from Hypofunctional Voices in Sustained Vowel and Continuous Speech Contexts
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Watts, Christopher R.; Awan, Shaheen N. – Journal of Speech, Language, and Hearing Research, 2011
Purpose: In this study, the authors evaluated the diagnostic value of spectral/cepstral measures to differentiate dysphonic from nondysphonic voices using sustained vowels and continuous speech samples. Methodology: Thirty-two age- and gender-matched individuals (16 participants with dysphonia and 16 controls) were recorded reading a standard…
Descriptors: Vowels, Oral Language, Etiology, Spectroscopy
Quantifying Dysphonia Severity Using a Spectralcepstral-Based Acoustic Index: Comparisons with Auditory-Perceptual Judgements from the CAPE-V
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Awan, Shaheen N.; Roy, Nelson; JettE, Marie E.; Meltzner, Geoffrey S.; Hillman, Robert E. – Clinical Linguistics & Phonetics, 2010
This study investigated the relationship between acoustic spectral/cepstral measures and listener severity ratings in normal and disordered voice samples. CAPE-V sentence samples and the vowel /[script]/were elicited from eight normal speakers and 24 patients with varying degrees of dysphonia severity. Samples were analysed for measures of the…
Descriptors: Voice Disorders, Patients, Acoustics, Auditory Perception
Outcomes Measurement in Voice Disorders: Application of an Acoustic Index of Dysphonia Severity
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Awan, Shaheen N.; Roy, Nelson – Journal of Speech, Language, and Hearing Research, 2009
Purpose: The purpose of this experiment was to assess the ability of an acoustic model composed of both time-based and spectral-based measures to track change following voice disorder treatment and to serve as a possible treatment outcomes measure. Method: A weighted, four-factor acoustic algorithm consisting of shimmer, pitch sigma, the ratio of…
Descriptors: Voice Disorders, Acoustics, Severity (of Disability), Outcomes of Treatment
An Investigation of Voice Quality in Individuals with Inherited Elastin Gene Abnormalities
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Watts, Christopher R.; Awan, Shaheen N.; Marler, Jeffrey A. – Clinical Linguistics & Phonetics, 2008
The human elastin gene (ELN) is responsible for the generation of elastic fibres in the extracellular matrix of connective tissue throughout the body, including the vocal folds. Individuals with Supravalvular aortic stenosis (SVAS) and Williams syndrome (WS) lack one normal ELN allele due to heterozygous ELN abnormalities, resulting in a…
Descriptors: Biomechanics, Acoustics, Genetics, Cytology
Effects of Smoking on Respiratory Capacity and Control
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Awan, Shaheen N.; Alphonso, Vania A. – Clinical Linguistics & Phonetics, 2007
The purpose of this study was to provide information concerning the possible early effects of smoking on measures of respiratory capacity and control in young adult female smokers vs. nonsmokers. In particular, maximum performance test results (vital capacity and maximum phonation time) and measures of air pressures and airflows during voiceless,…
Descriptors: Test Results, Young Adults, Smoking, Females
Toward the Development of an Objective Index of Dysphonia Severity: A Four-Factor Acoustic Model
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Awan, Shaheen N.; Roy, Nelson – Clinical Linguistics & Phonetics, 2006
During assessment and management of individuals with voice disorders, clinicians routinely attempt to describe or quantify the severity of a patient's dysphonia. This investigation used acoustic measures derived from sustained vowel samples to predict dysphonia severity (as determined by auditory-perceptual ratings), for a diverse set of voice…
Descriptors: Severity (of Disability), Prediction, Multiple Regression Analysis, Acoustics
The Aging Female Voice: Acoustic and Respiratory Data
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Awan, Shaheen N. – Clinical Linguistics & Phonetics, 2006
The purpose of this study was to extend understanding of the effects of aging on the female voice by obtaining measures of both acoustic and respiratory-based performance in groups of 18-30, 40-49, 50-59, 60-69, and 70-79-year-old subjects. Acoustic measures of speaking fundamental frequency (SFF), pitch sigma, jitter, shimmer, and signal-to-noise…
Descriptors: Discriminant Analysis, Acoustics, Age Groups, Females