What does the "Emitter Size" property do in audio / sounds?

The title says it all. Basically I want to know what the “Emitter Size” property do in sounds / audio(s).

It’s the distance at which a sound will start to decrease volume. Please check the devhub before you ask. I found this in about 10 seconds: https://developer.roblox.com/en-us/api-reference/property/Sound/EmitterSize

The minimum distance at which a 3D Sound (direct child of a BasePart or Attachment ) will begin to attenuate (decrease in volume).

The way the Sound attenuates (fades out) after the distance between the listener and the sound exceeds the Sound.EmitterSize is determined by Sound.RollOffMode .