Class

SFAcousticFeature

The value of a voice analysis metric.

Declaration

class SFAcousticFeature : NSObject

Topics

Inspecting a Feature

var frameDuration: TimeInterval

The duration of the audio frame.

var acousticFeatureValuePerFrame: [Double]

An array of feature values, one value per audio frame, corresponding to a transcript segment of recorded audio.

Relationships

Inherits From

See Also

Analyzing Voice

var voicing: SFAcousticFeature

The likelihood of a voice in each frame of a transcription segment, expressed as a probability in the range [0.0, 1.0].

var pitch: SFAcousticFeature

The highness or lowness of the tone (fundamental frequency) in each frame of a transcription segment, expressed as a logarithm.

var jitter: SFAcousticFeature

The variation in pitch in each frame of a transcription segment, expressed as a percentage of the frame’s fundamental frequency.

var shimmer: SFAcousticFeature

The variation in vocal volume stability (amplitude) in each frame of a transcription segment, expressed in decibels.