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A Simple Method to Obtain Basic Acoustic Measures From Video Recordings as Subtitles.
1Faculty of Science, Department of Biophysics, Voice Research Lab, Palacký University, Olomouc, Czech Republic.
Journal of Speech, Language, and Hearing Research : JSLHR
|September 1, 2018
Summary
A new software method extracts voice acoustics, calculating sound pressure level (SPL) and fundamental frequency (fo) from video recordings. This cost-effective approach integrates acoustic measures into videos without specialized hardware.
Area of Science:
- Acoustic analysis
- Voice science
- Laryngology
Background:
- Sound pressure level (SPL) and fundamental frequency (fo) are crucial for voice quality assessment.
- Vocal fold vibration characteristics are influenced by variations in SPL and fo.
- Sophisticated laryngeal systems often use expensive hardware for real-time SPL and fo display.
Purpose of the Study:
- To present a simple, software-based method for obtaining SPL and fo measures from video recordings.
- To integrate acoustic data as video subtitles, bypassing the need for specialized hardware.
- To offer an accessible alternative for voice analysis in various video formats.
Main Methods:
- A software tool extracts acoustic data directly from video recordings.
- The software calculates SPL and fo parameters.
- Acoustic data is calibrated using a sound level meter for accurate SPL values.
- Calculated parameters are saved as video subtitles.
Main Results:
- The method was successfully tested on videokymographic recordings.
- SPL and fo values were accurately calculated from the videokymographic data.
- The creation and display of subtitles containing acoustic measures were demonstrated.
Conclusions:
- This software-based method provides a cost-effective way to integrate acoustic measures (SPL, fo) into video recordings.
- It is particularly useful when built-in hardware for acoustic analysis is unavailable.
- Proper calibration and attention to data acquisition/synchronization are essential for reliable results.
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