---
title: PHASEDirectivityModelParameters
framework: phase
role: symbol
role_heading: Class
path: phase/phasedirectivitymodelparameters
---

# PHASEDirectivityModelParameters

A base class for objects that direct sound.

## Declaration

```swift
class PHASEDirectivityModelParameters
```

## Overview

Overview Several classes derive from this class that implement a unique strategy to direct sound. Rather than create an instance of this class, instantiate a subclass, such as PHASECardioidDirectivityModelParameters or PHASEConeDirectivityModelParameters.

## Relationships

### Inherits From

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

### Inherited By

- [PHASECardioidDirectivityModelParameters](phase/phasecardioiddirectivitymodelparameters.md)
- [PHASEConeDirectivityModelParameters](phase/phaseconedirectivitymodelparameters.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)

## See Also

### Sound Directivity

- [PHASECardioidDirectivityModelParameters](phase/phasecardioiddirectivitymodelparameters.md)
- [PHASECardioidDirectivityModelSubbandParameters](phase/phasecardioiddirectivitymodelsubbandparameters.md)
- [PHASEConeDirectivityModelParameters](phase/phaseconedirectivitymodelparameters.md)
- [PHASEConeDirectivityModelSubbandParameters](phase/phaseconedirectivitymodelsubbandparameters.md)