Indoor sirens and flash beacons
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Indoor sirens and flash beacons are used as an accessory for acoustic and optical signaling of alarm conditions (burglary, fire, distress alarm, opening of the safe by an unauthorized person, disruption of a perimeter of a large object, etc.). Indoor sirens are also used to create an acoustically unbearable environment when the customer does not wish to install an outdoor siren. It is not unusual that the client defines to have sirens hidden in the premises of interest or in the whole building to create an acoustic pressure field from all directions (4 sirens of 125dB / m in each room, protected from attack). It is certainly a delicacy to create an unwanted alarm in such an object - all staff incl. animals usually leave the object before someone can finally deactivate the alarm under stress ... (see "acoustic baton")
