Document Detail

Validity of the nasometer measuring the temporal characteristics of nasalization.
MedLine Citation:
PMID:  17760487     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To examine the validity of the Nasometer (KayPENTAX, Lincoln Park, NJ) in measuring the temporal characteristics of nasalization by comparing the Nasometer measures to the measures from an external criterion procedure. DESIGN: Speech samples consisted of three rate-controlled nonsense syllables, which varied in their vowel compositions: /izinizi/, /azanaza/, and /uzunuzu/. Acoustic data were recorded simultaneously through the Nasometer and an external criterion procedure (a specialized microphone set that collected acoustic signals separately for the nasal and oral channels). Speech segment durations measured from the two instrumental conditions were compared on the Nasometer display and the Computerized Speech Lab (KayPENTAX, Lincoln Park, NJ) display. Five durational variables were measured: total utterance duration, nasal onset interval, nasal consonant duration, nasal offset interval, and total nasalization duration. PARTICIPANTS: Fourteen normal adults who speak American English as their first language participated in the study. RESULTS: No significant differences were found between the measures from the Nasometer and those from an external criterion procedure in all the durational variables pertinent to nasalization. Different vowels, however, yielded significantly different patterns in these durational variables, in which the low vowel /a/ context revealed significantly longer total nasalization duration than did the high vowel /i/ and /u/ contexts. CONCLUSIONS: The results suggest that the Nasometer can be used as a valid tool to measure the temporal characteristics underlying nasalization and confirm significant vowel effects on the temporal patterns of nasalization.
Youkyung Bae; David P Kuehn; Seunghee Ha
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Publication Detail:
Type:  Comparative Study; Journal Article; Validation Studies    
Journal Detail:
Title:  The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association     Volume:  44     ISSN:  1055-6656     ISO Abbreviation:  Cleft Palate Craniofac. J.     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-08-31     Completed Date:  2007-11-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9102566     Medline TA:  Cleft Palate Craniofac J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  506-17     Citation Subset:  D; IM    
Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, USA.
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MeSH Terms
Linear Models
Reproducibility of Results
Rhinometry, Acoustic / instrumentation*
Speech Production Measurement / instrumentation*
Tape Recording
Time Factors
Velopharyngeal Insufficiency / diagnosis
Voice Disorders / diagnosis*

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