---
title: acousticFeatureValuePerFrame
framework: speech
role: symbol
role_heading: Instance Property
path: speech/sfacousticfeature/acousticfeaturevalueperframe-5krkk
---

# acousticFeatureValuePerFrame

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

## Declaration

```swift
var acousticFeatureValuePerFrame: [Double] { get }
```

## See Also

### Inspecting a feature

- [frameDuration](speech/sfacousticfeature/frameduration.md)