ai_sound
ai_sound is an existing point entity available
in 
Half-Life 2
with all versions of Mapbase.This entity makes sounds or smells that can be sensed by NPCs, butnot by the player. This can be used to cause reactions in nearby NPCs.
Sound Types Combat: Will cause most NPCs to become alert World: Will cause most NPCs to become alert Danger: Will cause most NPCs to move away from the position of the sound Bullet Impact: Carcass: Meat: Garbage: Thumper: causes antlions to run away briefly Readiness: (Low, Medium, High) Causes player companions that can hear this sound to change readiness
KeyValues
- Sound Owner (target) <target_destination>
An optional entity to use that the sound doesn't emit from, but is specified as the 'owner'. This is needed for certain sound contexts and other miscellaneous stuff. If not specified, the ai_sound will be used as the owner.
An optional entity to use that the sound doesn't emit from, but is specified as the 'owner'. This is needed for certain sound contexts and other miscellaneous stuff. If not specified, the ai_sound will be used as the owner.