Even though they may sound like they function the same way, all burglar alarms work in a very different manner. In today's world, burglar alarms have now become a standard/essential commodity in every building. Security systems can be compared to the arms race, meaning, as the security to protect gets better, thieves and burglars have to find newer and better ways of breaking and avoiding the system. Even though burglary is bad, burglar systems have evolved due to this.
Burglar alarms work on the basic principle of the opening and closing of circuits. The alarm protects a particular location, maybe a window or a door. The burglar alarm works if the circuit is interrupted or finished when there is a change in position of the door. In a closed-circuit system, the circuit is interrupted when a person moves the door and in an open-circuit system, the circuit is completed.
In the event that the location to be protected is a window, the kind of system differs. In the case, of a person breaking the glass, a glass-break detection system is effective. It helps by detecting the sonic, infra-sonic and ultra-sonic sounds that are made when glass breaks. You can even use closed-circuit alarm systems like window protection systems.
You will be able to find simpler alarm systems, like a button that is installed in the door frame. In the event, that the door is opened, the button pops out and the alarm sounds. Likewise, some people use the button under the welcome mat, where if a person stands on the mat, an alarm starts ringing.
Some burglar alarms work by detecting presence in a room. These are microwave and ultra-sonic detectors that sends and receives a wave of energy. If the send and receive is constant, then there is no alarm, but if there is a big difference then the alarm will sound.
The main reason that burglar alarms work is for the security of people. Nevertheless, just being alerted to an intruder is not enough for a crime to not happen. New developments in this field provide the alarm system to have remote and local alarms. A remote alarm will not create a sound at the location it is guarding, but at a secondary location, that could be the security firm or even a message to a cell phone or email address. This gives the victim a chance to call the police without the criminal knowing that he has been detected. Alarms that ring at the location are normally loud and irritating, but the function is mostly to scare the intruder and try to draw attention to the crime. The best alarms today, ring both locally and remotely.
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