Class

SFAcousticFeature

The value of a voice analysis metric.

Declaration

@interface SFAcousticFeature : NSObject

Topics

Getting the Number of Feature Values

acousticFeatureValuePerFrame

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

Getting the Duration

frameDuration

The duration of the audio frame.

Relationships

Inherits From

Conforms To

See Also

Analyzing Voice

voicing

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

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.