# Sandbox.SoundFalloffMode

How a sound's volume falls off with distance.

- Kind: enum
- Namespace: `Sandbox`
- Assembly: `Sandbox.Engine`
- Modifiers: sealed

## Fields

- [`Curve`](/api/Sandbox.SoundFalloffMode/Curve): The falloff curve, evaluated from the source (0) to the max distance (1).
- [`Physical`](/api/Sandbox.SoundFalloffMode/Physical): Inverse distance: full volume within the min distance, half the volume every time the distance doubles beyond it, faded out towards the max distance.