The value of a voice analysis metric.
SDKs
- iOS 13+
- macOS 10.15+
- Mac Catalyst 13.0+
Framework
- Speech
Declaration
@interface SFAcousticFeature : NSObject
The value of a voice analysis metric.
SDKs
Framework
@interface SFAcousticFeature : NSObject
frame Duration
The duration of the audio frame.
acoustic Feature Value Per Frame
An array of feature values, one value per audio frame, corresponding to a transcript segment of recorded audio.
voicing
The likelihood of a voice in each frame of a transcription segment, expressed as a probability in the range [0
.
pitch
The highness or lowness of the tone (fundamental frequency) in each frame of a transcription segment, expressed as a logarithm.
jitter
The variation in pitch in each frame of a transcription segment, expressed as a percentage of the frame’s fundamental frequency.
shimmer
The variation in vocal volume stability (amplitude) in each frame of a transcription segment, expressed in decibels.