Using knowledge on which audio frames do and do not contain voice, the prevalence of voice as opposed to silence across the audio file is also calculated simply as a derived variable.
Raw Variables
| Variable | Description |
|---|
aco_voiceframe | Voice frames. Number of frames in the audio where speech was detected. |
aco_totvoiceframe | Total frames. Total number of frames in the audio. |
aco_voicepct | Percentage of frames with voice. aco_voiceframe divided by aco_totvoiceframe. |
Derived Variables
| Variable | Description |
|---|
aco_voicepct_mean | Percentage of frames with voice mean. |