Document Detail

Effects of vocal intensity and vowel type on cepstral analysis of voice.
MedLine Citation:
PMID:  22480754     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES/HYPOTHESIS: The purpose of this study was to specifically examine the effects of vocal loudness/intensity condition and vowel type on cepstral analysis measurements.
STUDY DESIGN: Experimental, mixed design.
METHODS: Sustained vowel samples of /i/, /ɑ/, /u/, and /æ/ were elicited from 92 healthy male and female subjects between the ages of 18 and 30 years at three different vocal loudness conditions: (1) "Comfortable pitch and loudness," (2) "As softly as possible without whispering," and (3) "As loudly as possible, without screaming/straining the voice or tensing of the neck region." Recordings were made using a calibrated headset microphone and digitized to computer. Vowel samples were analyzed for vocal intensity (decibels), fundamental frequency (F0 in Hertzz), and relative amplitude of the smoothed cepstral peak prominence (CPPs in decibels).
RESULTS: Significant main effects of loudness condition (with a significant increase in CPPs from quiet to comfortable to loud voice) and gender (males having significantly greater mean CPPs than females) were observed. In addition, results indicated that vowel type had a significant effect on the CPP (greater CPPs for low vowels [/ɑ/ and /æ/] vs high vowels [/i/ and /u/]).
CONCLUSIONS: The results of this study indicate that both the loudness/intensity of vowel elicitation and vowel type should be monitored closely in both research and clinical situations. Changes in the mode of phonation, as well supraglottal changes that effect vocal tract resonances and vocal intensity, appear to combine to result in substantial differences in the CPPs for different vocal loudness/intensity conditions and vowel types. These results indicate that separate cepstral norms are necessary for vowel type, as well as for gender, when using cepstral analysis as a clinical tool.
Shaheen N Awan; Ashley Giovinco; Jennifer Owens
Related Documents :
20981394 - Fluorometric paired emitter detector diode (fpedd).
12893314 - Photoelectric effects on chlorophyll fluorescence of photosystem ii in vivo. kinetics i...
3174384 - Measurement of neuronal ca2+ transients using simultaneous microfluorimetry and electro...
23473524 - Clinicopathologic study of solar dermatitis, a pinpoint papular variant of polymorphous...
8003674 - A hybrid frame of reference for visuo-manual coordination.
22570384 - Glutamate modulates the firing rate in oculomotor nucleus motoneurons as a function of ...
Publication Detail:
Type:  Journal Article     Date:  2012-04-03
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  26     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-07     Completed Date:  2013-02-14     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  670.e15-20     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 The Voice Foundation. Published by Mosby, Inc. All rights reserved.
Department of Audiology and Speech Pathology, Bloomsburg University of Pennsylvania, Bloomsburg, Pennsylvania 17815-1301, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Analysis of Variance
Sex Factors
Sound Spectrography
Speech Acoustics*
Speech Production Measurement
Time Factors
Voice Quality*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Vocal Release Time: A Quantification of Vocal Offset.
Next Document:  Reduced-intensity chemotherapy and PET-guided radiotherapy in patients with advanced stage Hodgkin's...