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Objective analysis of voice in normal young adults
1Department of ENT-HNS, Kathmandu Medical College, Sinamangal, Nepal. torankc@yahoo.com
This study standardized acoustic voice parameters like jitter, shimmer, harmonic to noise ratio (HNR), and fundamental frequency (F0) in young adults. Results highlight the need to standardize analysis programs for different populations.
Area of Science:
- Speech and Hearing Sciences
- Acoustic Phonetics
Background:
- Acoustic vocal parameters, including frequency, intensity, jitter, shimmer, and dynamic range, are crucial for voice analysis.
- Establishing normative data is essential for accurate acoustic voice assessment.
Purpose of the Study:
- To standardize key acoustic voice parameters: Jitter, shimmer, harmonic to noise ratio (HNR), and fundamental frequency (F0).
- To establish normative data for these parameters in young adults with normal voices.
Main Methods:
- Acoustic voice measurements were collected from 50 healthy young adults (25 males, 25 females).
- Data were acquired using the Doctor Speech (DRS) system.
- Analysis involved sustained vowel /i/ production.
Main Results:
- Jitter and HNR values showed no significant gender difference (Jitter: 1.6%; HNR: 25.8 dB).
- Specific jitter values were 0.14% for males and 0.16% for females.
- Significant gender differences were found in HNR (P<0.000), with males averaging 170.05 Hz and females 246.45 Hz.
Conclusions:
- The study's findings differ from existing literature, emphasizing the importance of population-specific standardization.
- It is critical to validate and standardize acoustic analysis programs before applying them to diverse populations.
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