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# SNTimeDurationConstraintType

Defines the types a time duration constraint uses.

```
enum SNTimeDurationConstraintType : NSInteger;
```

## Topics

### Constraint Types

[`SNTimeDurationConstraintTypeEnumerated`](/documentation/SoundAnalysis/SNTimeDurationConstraintType/SNTimeDurationConstraintTypeEnumerated)

A constraint type that uses an array of time durations to define what a request’s underlying sound classifier accepts.

[`SNTimeDurationConstraintTypeRange`](/documentation/SoundAnalysis/SNTimeDurationConstraintType/SNTimeDurationConstraintTypeRange)

A constraint type that uses a time duration range to define what a request’s underlying sound classifier accepts.


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