Document Detail

Preliminary study of acoustic analysis for evaluating speech-aid oral prostheses: Characteristic dips in octave spectrum for comparison of nasality.
MedLine Citation:
PMID:  24568951     Owner:  NLM     Status:  Publisher    
BACKGROUND/PURPOSE: Acoustic analysis is often used in speech evaluation but seldom for the evaluation of oral prostheses designed for reconstruction of surgical defect. This study aimed to introduce the application of acoustic analysis for patients with velopharyngeal insufficiency (VPI) due to oral surgery and rehabilitated with oral speech-aid prostheses.
METHODS: The pre- and postprosthetic rehabilitation acoustic features of sustained vowel sounds from two patients with VPI were analyzed and compared with the acoustic analysis software Praat.
RESULTS: There were significant differences in the octave spectrum of sustained vowel speech sound between the pre- and postprosthetic rehabilitation. Acoustic measurements of sustained vowels for patients prior to and after prosthetic treatment showed no significant differences for all parameters of fundamental frequency, jitter, shimmer, noise-to-harmonics ratio, formant frequency, F1 bandwidth, and band energy difference. The decrease in objective nasality perceptions correlated very well with the decrease in dips of the spectra for the male patient with a higher speech bulb height.
CONCLUSION: Acoustic analysis may be a potential technique for evaluating the functions of oral speech-aid prostheses, which eliminates dysfunctions due to the surgical defect and contributes to a high percentage of intelligible speech. Octave spectrum analysis may also be a valuable tool for detecting changes in nasality characteristics of the voice during prosthetic treatment of VPI.
Yen-Liang Chang; Chao-Ho Hung; Po-Yueh Chen; Wei-Chang Chen; Shih-Han Hung
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-22
Journal Detail:
Title:  Journal of the Formosan Medical Association = Taiwan yi zhi     Volume:  -     ISSN:  0929-6646     ISO Abbreviation:  J. Formos. Med. Assoc.     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-2-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9214933     Medline TA:  J Formos Med Assoc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier B.V.
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