# Sandbox.Surface.PlayCollisionSound

```csharp
SoundHandle PlayCollisionSound(Vector3 position, float speed = 320)
```

Play a collision sound based on this shape's surface. Can return null if sound is invalid, or too quiet to play.

### Parameters

- `position` (`Vector3`)
- `speed` (`float`), default `320`

### Returns

`SoundHandle`

Declared in [Sandbox.Surface](/api/Sandbox.Surface).
Assembly: `Sandbox.Engine`.