---
title: AVAudioEnvironmentDistanceAttenuationParameters
framework: avfaudio
role: symbol
role_heading: Class
path: avfaudio/avaudioenvironmentdistanceattenuationparameters
---

# AVAudioEnvironmentDistanceAttenuationParameters

An object that specifies the amount of attenuation distance, the gradual loss in audio intensity, and other characteristics.

## Declaration

```swift
class AVAudioEnvironmentDistanceAttenuationParameters
```

## Overview

Overview important: A source object (for example, AVAudioEnvironmentNode) provides an instance to this object. You can’t create standalone instances.

## Topics

### Getting and Setting the Attenuation Model

- [distanceAttenuationModel](avfaudio/avaudioenvironmentdistanceattenuationparameters/distanceattenuationmodel.md)
- [AVAudioEnvironmentDistanceAttenuationModel](avfaudio/avaudioenvironmentdistanceattenuationmodel.md)

### Getting and Setting the Attenuation Values

- [maximumDistance](avfaudio/avaudioenvironmentdistanceattenuationparameters/maximumdistance.md)
- [referenceDistance](avfaudio/avaudioenvironmentdistanceattenuationparameters/referencedistance.md)
- [rolloffFactor](avfaudio/avaudioenvironmentdistanceattenuationparameters/rollofffactor.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)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Spatial audio

- [AVAudioEnvironmentNode](avfaudio/avaudioenvironmentnode.md)
- [AVAudioEnvironmentReverbParameters](avfaudio/avaudioenvironmentreverbparameters.md)
- [AVAudio3DMixing](avfaudio/avaudio3dmixing.md)
- [AVAudio3DPoint](avfaudio/avaudio3dpoint.md)
- [AVAudio3DVectorOrientation](avfaudio/avaudio3dvectororientation.md)
- [AVAudio3DAngularOrientation](avfaudio/avaudio3dangularorientation.md)
- [AVAudio3DMixingSourceMode](avfaudio/avaudio3dmixingsourcemode.md)
- [AVAudio3DMixingRenderingAlgorithm](avfaudio/avaudio3dmixingrenderingalgorithm.md)
- [AVAudioEnvironmentOutputType](avfaudio/avaudioenvironmentoutputtype.md)
- [AVAudio3DMixingPointSourceInHeadMode](avfaudio/avaudio3dmixingpointsourceinheadmode.md)
- [AVAudio3DVector](avfaudio/avaudio3dvector.md)