---
title: SRSpeechExpression
framework: sensorkit
role: symbol
role_heading: Class
path: sensorkit/srspeechexpression
---

# SRSpeechExpression

An object that represents the metrics and voice analytics for a range of speech.

## Declaration

```swift
class SRSpeechExpression
```

## Overview

Overview Use the properties of this class to get the characteristics of the speech, such as the user’s confidence level and mood.

## Topics

### Getting speech metrics

- [timeRange](sensorkit/srspeechexpression/timerange.md)
- [version](sensorkit/srspeechexpression/version.md)

### Getting speech analytics

- [confidence](sensorkit/srspeechexpression/confidence.md)
- [mood](sensorkit/srspeechexpression/mood.md)
- [valence](sensorkit/srspeechexpression/valence.md)
- [activation](sensorkit/srspeechexpression/activation.md)
- [dominance](sensorkit/srspeechexpression/dominance.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Analyzing speech

- [SRSpeechMetrics](sensorkit/srspeechmetrics.md)