A clinical comparison between two acoustic analysis softwares: MDVP and Praat

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Abstract

The Multi-Dimensional Voice Program (MDVP) and Praat are computer programs commonly used for acoustic analysis of voice in clinical and research settings. Both softwares extract a set of acoustic parameters, many of which are defined similarly. The purpose of this study was to compare results obtained by both programs, and examine whether they can clinically distinguish among pathological groups differently. Fifty-eight women participated in the study. Of these women, 28 were diagnosed with functional dysphonia and 30 were diagnosed with benign mass-lesions (10 nodules, ten polyps and 10 cysts). Six productions of the vowels /a/ and /i/, were analyzed using MDVP and Praat. Results show similar mean fundamental-frequency (mF0) values for both programs (P > 0.05). However, values of jitter, shimmer, noise-to-harmonic ratio (NHR) and degree of unvoiced (DUV) segment were significantly lower using Praat, in comparison with MDVP. Jitter values obtained using MDVP, for the vowel /i/, revealed a significant group difference between the nodule and cyst groups (P < 0.05). This group contrast was not observed using Praat. Results demonstrate that although high correlations are found between values obtained by both programs, individual numerical values vary greatly. Therefore, combining results from both programs are not advisable. In addition, there are indications that linear transformation for the results from one program to the other might lead to erroneous conclusions, and should be carried out with caution.

Original languageEnglish
Pages (from-to)202-205
Number of pages4
JournalBiomedical Signal Processing and Control
Volume4
Issue number3
DOIs
StatePublished - Jul 2009

Keywords

  • Acoustic analysis
  • MDVP
  • Praat
  • Voice disorders

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