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Objective voice analysis for vocal polyps following microlaryngeal phonosurgery
1Department of ENT-HNS, Kathmandu Medical College, Sinamangal, Nepal. torankc@yahoo.com
Kathmandu University Medical Journal (KUMJ)
|January 7, 2011
Summary
Microlaryngeal phonosurgery (MLPS) significantly improved voice quality in patients with vocal polyps. Acoustic analysis showed decreased shimmer, harmonic-to-noise ratio, and fundamental frequency after surgery, indicating better vocal outcomes.
Area of Science:
- Otolaryngology
- Speech-Language Pathology
- Acoustic Analysis
Background:
- Vocal polyps stem from voice misuse and are typically treated with voice therapy or Microlaryngeal Phonosurgery (MLPS).
- Perceptual voice quality assessment after treatment can be subjective and prone to variability.
- Objective acoustic analysis offers a more reliable method for evaluating treatment outcomes.
Purpose of the Study:
- To acoustically evaluate changes in voice quality in patients before and after MLPS.
- To compare objective acoustic parameters pre- and post-surgery for vocal polyp treatment.
Main Methods:
- Acoustic analysis of voice recordings from 23 patients with vocal polyps before and 3-4 weeks after MLPS.
- Utilized Dr. Speech acoustic software to measure perturbation (Jitter, Shimmer), Harmonic-to-Noise Ratio (HNR), and Fundamental Frequency (F0).
Main Results:
- Significant decrease in Shimmer, HNR, and F0 (p<0.05) observed post-MLPS.
- Jitter showed a reduction, but the change was not statistically significant (p=0.694).
Conclusions:
- MLPS leads to general acoustic improvement in voice quality for patients with vocal polyps.
- Objective acoustic analysis provides valuable data for clinical assessment of vocal polyp treatment outcomes.
- Phonosurgical procedures are effective in enhancing voice quality.
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