Document Detail


Validity of jitter measures in non-quasi-periodic voices. Part II: The effect of noise.
MedLine Citation:
PMID:  21609247     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract In this paper the effect of noise on both perceptual and automatic evaluation of the glottal cycle length in irregular voice signals (sustained vowels) is studied. The reliability of four tools for voice analysis (MDVP, Praat, AMPEX, and BioVoice) is compared to visual inspection made by trained clinicians using two measures of voice signal irregularity: the jitter (J) and the coefficient of variation of the fundamental frequency (F0CV). The purpose is also to test to what extent of irregularity trained raters are capable of determining visually the glottal cycle length as compared to dedicated software tools. For a perfect control of the amount of jitter and noise put in, data consist of synthesized sustained vowels corrupted by increasing jitter and noise. Both jitter and noise can be varied to the desired extent according to built-in functions. All the tools give almost reliable measurements up to 15% of jitter, for low or moderate noise, while only few of them are reliable for higher jitter and noise levels and would thus be suited for perturbation measures in strongly irregular voice signals. As shown in Part I of this work, for low noise levels the results obtained by visual inspection from expert raters are comparable or better than those obtained with the tools presented here, at the expense of a larger amount of time devoted to searching visually for the glottal cycle lengths in the signal waveform. In this paper it is shown that results rapidly deteriorate with increasing noise. Hence, the use of a robust tool for voice analysis can give valid support to clinicians in term of reliability, reproducibility of results, and time-saving.
Authors:
Claudia Manfredi; Andrea Giordano; Jean Schoentgen; Samia Fraj; Leonardo Bocchi; Philippe Dejonckere
Related Documents :
6603197 - A kinetic study comparing the light-reversal properties of carbon monoxide inhibition o...
16658467 - The relation between photophosphorylation and delayed light emission in chloroplasts.
21647647 - Species difference in the timing of gaze movement between chimpanzees and humans.
21568437 - Signal-to-noise ratio for source determination and for a comodulated masker in goldfish...
19813017 - Visual detection of diminutive floral guides in the bumblebee bombus terrestris and in ...
747197 - An improved electrode for electroretinography: design and standardization.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-24
Journal Detail:
Title:  Logopedics, phoniatrics, vocology     Volume:  -     ISSN:  1651-2022     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9617311     Medline TA:  Logoped Phoniatr Vocol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Università degli Studi di Firenze, Department of Electronics and Telecommunications , Via S. Marta 3, Firenze, 50139 , Italy.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Effectiveness of a primary school-based intervention to reduce overweight.
Next Document:  Monitoring of blood pressure in overweight and obese children in Shandong, China.