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A voice accumulator device: evaluation based on studio and field recordings
A Szabo1, B Hammarberg, A Håkansson
1Karolinska Institute, Department of Logopedics and Phoniatrics, Huddinge University Hospital, Stockholm, Sweden. annika.szabo@klinvet.ki.se
This study found that the voice accumulator, a portable device for measuring voice use, accurately captures fundamental frequency (F0) and phonation time. Proper microphone placement is key for reliable vocal fold vibration detection in clinical and research settings.
Area of Science:
- Speech Science
- Biomedical Engineering
- Acoustics
Background:
- The voice accumulator is a portable device designed for long-term voice use measurements in natural environments.
- It utilizes a contact microphone on the neck to detect vocal fold vibrations.
Purpose of the Study:
- To evaluate the accuracy of the voice accumulator's two measurement programs for fundamental frequency (F0) and phonation time.
- To assess the device's suitability for field recordings in real-world conditions.
Main Methods:
- Four healthy subjects were recorded in a sound-proof booth using both the voice accumulator and a computer-based system.
- Simultaneous recordings were made with contact microphones for comparative analysis.
- Field recordings were conducted with four subjects during a typical workday.
Main Results:
- High correlations (r >= 0.85) were observed between the voice accumulator's measurements and a signal-processing program for F0 and phonation time, though one subject showed variability.
- Reliable detection of vocal fold vibrations depended on careful and firm placement of the contact microphone.
- The device demonstrated effectiveness in field recordings over a working day.
Conclusions:
- The voice accumulator is a valuable instrument for measuring fundamental frequency (F0) and phonation time.
- Its accuracy and portability make it suitable for both clinical applications and scientific research.
- Proper microphone attachment is crucial for optimal performance.
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