---
title: jitter
framework: speech
role: symbol
role_heading: Instance Property
path: speech/sfvoiceanalytics/jitter
---

# jitter

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

## Declaration

```swift
@NSCopying var jitter: SFAcousticFeature { get }
```

## See Also

### Analyzing voice

- [SFAcousticFeature](speech/sfacousticfeature.md)
- [voicing](speech/sfvoiceanalytics/voicing.md)
- [pitch](speech/sfvoiceanalytics/pitch.md)
- [shimmer](speech/sfvoiceanalytics/shimmer.md)