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# Audio Session Interruption States

Identifiers used with the [`AudioSessionInterruptionListener`](/documentation/AudioToolbox/AudioSessionInterruptionListener) callback function in iOS to indicate that an audio interruption has started or stopped.

## Topics

### Constants

[`var kAudioSessionBeginInterruption: Int`](/documentation/AudioToolbox/kAudioSessionBeginInterruption)

Your app’s audio session has just been interrupted, such as by a phone call.

[`var kAudioSessionEndInterruption: Int`](/documentation/AudioToolbox/kAudioSessionEndInterruption)

The interruption to your app’s audio session has just ended. In the case where a user confirms the interruption, such as answering a phone call, your app will not receive this constant.


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