Mehmet Akif KILIÇ, Mustafa Asım ŞAFAK, Haldun OĞUZ

Comparison of results in two acoustic analysis programs: Praat and MDVP

To compare acoustic analysis results obtained by 2 computer programs, Praat and the Multi-Dimensional Voice Program (MDVP). Different voice analysis programs use similar descriptions to define voice perturbation measures. Materials and methods: A total of 47 voice samples reflecting a spectrum of normal and pathological voices were randomly selected from a database, and the same voice samples were used to obtain mean fundamental frequency, jitter, shimmer, and noise-to-harmonics ratio results from 2 acoustic analysis programs. Results: The results obtained for mean fundamental frequency and shimmer were not significantly different between the 2 computer programs. The results for jitter and noise-to-harmonics ratio, however, were significantly different between Praat and MDVP (P < 0.001). There was a strong correlation for mean fundamental frequency and jitter values. The correlations for shimmer values and the noise-to-harmonics ratio were moderate. Conclusion: The numerical values obtained for mean fundamental frequency were comparable between the 2 computer programs. The values obtained for shimmer were not significantly different, but the correlation was moderate. The jitter values and noise-to-harmonics ratio were not comparable between the 2 acoustic analysis programs.

Anahtar Kelimeler:

Key words: Voice, acoustic analysis, voice analysis, MDVP, Praat

Comparison of results in two acoustic analysis programs: Praat and MDVP

Keywords:

Key words: Voice, acoustic analysis, voice analysis, MDVP, Praat,

PDF

___

Titze IR. Workshop on acoustic voice analysis: summary statement. Iowa City (IA): National Center for Voice and Speech; 1995. http://www.ncvs.org/ncvs/info/rescol/sumstat/ sumstat.pdf; accessed 25 June 2008.
Deliyski DD, Shaw HS, Ewans MK. Adverse eff ects of environmental noise on acoustic voice quality measurements. J Voice 2005; 19: 15-28.
Deliyski DD, Ewans MK, Shaw HS. Infl uence of data acquisition environment on accuracy of acoustic voice quality measurements. J Voice 2005; 19: 176-86. Smits I, Ceuppens P, De Bodt MS. A comparative study of acoustic voice measurements by means of Dr. Speech and Computerized Speech Lab. J Voice 2005; 19: 187-96.
Praat: doing phonetics by computer. http://www.praat.org; accessed 25 June 2008. Praat Tutorial Version 4.3, by Pascal van Lieshout. http://ots. utoronto.ca/users/vanlieshout/; accessed 8 August 2005. Praat beginner’s manual, by Sidney Wood. http://www.ling. lu.se/persons/Sidney/praate/frames.html; accessed 25 June 2008. 8. Praat Users Group. http://uk.groups.yahoo.com/group/praat- users/; accessed 25 June 2008. 9. Oguz H, Tarhan E, Korkmaz M, Yilmaz U, Safak MA, Demirci M et al. Acoustic analysis fi ndings in objective laryngopharyngeal refl ux patients. J Voice 2007; 21: 203-10.
Oguz H, Demirci M, Safak MA, Arslan N, Islam A, Kargin S. Eff ects of unilateral vocal cord paralysis on objective voice parameters. Eur Arch Otorhinolaryngol 2007; 264: 257-61.
Oguz H, Tunc T, Safak MA, Inan L, Kargin S, Demirci M. Objective voice changes in non-dysphonic Parkinson’s disease patients. J Otolaryngol 2006; 35: 349-54.
Wolfe V, Martin D. Acoustic correlates of dysphonia: type and severity. J Commun Disord 1997; 30: 403-15.
Praat manual. Version 4.2.17. Paul Boersma and David Weenink, Phonetic Sciences Department, University of Amsterdam, the Netherlands.
MDVP manual. Version 2.7.0, Kay Elemetrics Corporation, Lincoln Park, New Jersey, USA.
Reijonen P, Soderlund SL, Rihkanen H. Results of fascial augmentation in unilateral vocal fold paralysis. Ann Otol Rhinol Laryngol 2002; 111: 523-29.
Bielamowicz S, Kreiman J, Gerratt BR, Dauer MS, Berke GS. Comparison of voice analysis systems for perturbation measurement. J Speech Hear Res. 1996; 39: 126-34.
Boersma P. Stemmen meten met Praat. Stem-, Spraak- en Taalpathologie 2004; 12: 237-51.
Boersma P. Accurate short-term analysis of the fundamental frequency and the harmonics-to-noise ratio of a sampled sound. IFA Proceedings 1993; 17: 97-110.
Akcam T, Bolu E, Merati AL, Durmus C, Gerek M, Ozkaptan Y. Voice changes aft er androgen therapy for hypogonadotrophic hypogonadism. Laryngoscope 2004; 114: 1587-1591.
Kandogan T, Seifert E. Infl uence of aging and sex on voice parameters in patients with unilateral vocal cord paralysis. Laryngoscope 2005; 115: 655-660.
Kilic MA, Ogut F, Dursun G, Okur E, Yildirim I, Midilli R. Th e eff ects of vowels on voice perturbation measures. J Voice 2004; 18: 318-324.