_std/defines/sound.dm

SOUND_SKIP_OBSERVERS	Only applies to local playsound(s)
SOUND_IGNORE_DEAF	No you can't ignore admin PMs because you lost your auditory headset
SOUND_LIMITER_GRID_SIZE	the world gets split into a K-by-K grid and each tick each sound can only be played once in each big tile of this grid
BOTTALK_VOLUME	how loud are dectalk bots

Define Details

how loud are dectalk bots

No you can't ignore admin PMs because you lost your auditory headset

the world gets split into a K-by-K grid and each tick each sound can only be played once in each big tile of this grid

Only applies to local playsound(s)