Help with playing a sound to people in the proximity

Ok so I have a bank addon and I want to modify it so when someone robs the bank it plays a sound of a siren in repeat to people in the proximity. If someone could help me out with this I would be very happy.

If the siren is an entity, use this.

self.Entity:EmitSound(“alarm.wave”, 75, 100)

“75” is 75% of the normal audible distance and “100” is 100% of the normal sound pitch. You should leave the pitch at 100. You can change the audible distance ,but 75 “75%” is for people in the proximity.

so it would be like this all together if you sound the alarm by pressing use on it.

function ENT:Use( activator, ent )
     self.Entity:EmitSound("alarm.wave", 75, 100)

ok thanks ill see if that works