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Effects of Computer System and Vowel Loading on Measures of Nasalance.
MedLine Citation:
PMID:  21498579     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: The purpose of this study was to determine similarities and differences in nasalance scores observed with different computerized nasalance systems in the context of vowel-loaded sentences. Methodology Subjects were 46 Caucasian adults with no perceived hyper- or hyponasality. Nasalance scores were obtained using the Nasometer 6200, Nasometer II 6400, and the NasalView for sentences loaded with mixed, high front, high back, low front, or low back vowels. RESULTS: Measures of nasalance obtained with the NasalView were significantly higher than the Nasometer 6200, and the Nasometer 6200 significantly higher than the Nasometer II 6400. However, similar effects of vowel-loading on measures of nasalance were observed, regardless of system. For all systems, the high front vowel sentence tended to result in higher measures of nasalance than the high back, low front, and low back sentences - the mixed vowel sentence tended to have a higher degree of nasalance than any of the other sentences. CONCLUSIONS: Though nasalance data computed using different systems are not readily comparable, all three systems evaluated produced similar effects of vowel loading on nasalance. Increased nasalance for high-front vs. low-back vowels may be due to factors such as increased oral impedance, reduced radiated oral sound pressure, possible increases in airflow via the nasal cavity, and increased transpalatal nasalance.
Authors:
Shaheen N Awan; Kristin Omlor; Christopher R Watts
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-15
Journal Detail:
Title:  Journal of speech, language, and hearing research : JSLHR     Volume:  -     ISSN:  1558-9102     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Dept. of Audiology & Speech Pathology, Bloomsburg University of Pennsylvania, Bloomsburg, PA.
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