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Comparison of voice acquisition methodologies in speech research
1University of Melbourne, Victoria, Australia. avogel@cogstate.com
Behavior Research Methods
|November 13, 2008
Summary
Researchers found that standard laptops can accurately capture voice acoustic signals, similar to professional recorders. Minimum recording standards are essential for precise perturbation measures in voice analysis.
Area of Science:
- Speech science
- Acoustic analysis
- Biomedical engineering
Background:
- Voice acoustic techniques offer broad applications beyond speech pathology.
- Accessible, accurate, and cost-effective data acquisition is crucial for wider adoption.
- Existing methods often involve specialized, expensive equipment.
Purpose of the Study:
- To compare the accuracy of computer-based data acquisition with industry-standard recorders for voice acoustics.
- To evaluate the feasibility of using standard laptops for high-quality acoustic signal recording.
- To identify minimum recording standards for reliable acoustic measures.
Main Methods:
- Simultaneously recorded speech samples from 15 healthy participants using three methods: hard drive recorder, solid-state recorder, and standard laptop.
- Applied identical acoustic analysis techniques to data from all acquisition methods.
- Compared acoustic correlates including fundamental frequency (f0), noise-to-harmonic ratio, and pause counts.
Main Results:
- Selected acoustic measures (e.g., f0, noise-to-harmonic ratio, number of pauses) were accurately obtained across all three acquisition methods.
- Standard laptop recordings demonstrated comparable accuracy to professional recorders for several key acoustic parameters.
- Minimum recording standards were identified as necessary for accurate measurement of perturbation-related acoustic measures.
Conclusions:
- Standard laptops can serve as a viable, cost-effective tool for acquiring high-quality voice acoustic data.
- The findings support the broader use of accessible technology in voice analysis research and clinical practice.
- Adherence to specific recording standards is critical for ensuring the reliability of perturbation measures in voice analysis.
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