Alarm Sirens- There is both inside and outside sirens. Many towns have a noise ordinance, which should prevent your installer from putting yours outside, unless you are on a ranch where you need to know what’s going on while your out in the barn. You would not want a neighbor running over to your place during an alarm as they might be confronting a dangerous situation. It is better to let the police do that instead.
An inside siren is one that simulates a doorbell and placed high on a hallway wall, or a large siren is often placed in your return air vent. This will let a burglar know that they have violated an alarm so that they will hi- tail it out of there. It will also let you know that your system has been violated so that you can release the hounds, load your gun or hide under the covers, whatever you select as an appropriate response.
Sirens are measured in decibels and wattage. A large siren would be 30 watts or more and at least 100 decibels. If you settle for a non- descriptive commitment such as “It will be loud” you may have authorized a smaller and less expensive siren to be installed. They are all loud, but the louder the better when it comes to scaring a burglar away.
Source by Matthew F. Lombardi