The value of a voice analysis metric.
SDKs
- iOS 13+
- macOS 10.15+
- Mac Catalyst 13.0+
Framework
- Speech
Declaration
class SFAcousticFeature : NSObject
ClassSFAcoustic
SFAcoustic
Topics
Inspecting a Feature
var frameThe duration of the audio frame.
var acousticAn array of feature values, one value per audio frame, corresponding to a transcript segment of recorded audio.
See Also
Analyzing Voice
var voicing: SFAcousticThe likelihood of a voice in each frame of a transcription segment, expressed as a probability in the range [0.
var pitch: SFAcousticThe highness or lowness of the tone (fundamental frequency) in each frame of a transcription segment, expressed as a logarithm.
var jitter: SFAcousticThe variation in pitch in each frame of a transcription segment, expressed as a percentage of the frame’s fundamental frequency.
var shimmer: SFAcousticThe variation in vocal volume stability (amplitude) in each frame of a transcription segment, expressed in decibels.