The variation in vocal volume stability (amplitude) in each frame of a transcription segment, expressed in decibels.
SDKs
- iOS 13.0+
- macOS 10.15+
- Mac Catalyst 13.0+
Framework
- Speech
Declaration
@NSCopying var shimmer: SFAcousticInstance Property
shimmer
See Also
Analyzing Voice
class SFAcousticThe value of a voice analysis metric.
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.