Glass Broken Alarm
Glass broken alarm--glass breaker is usually installed on the wall or ceiling, is usedGlassThe broken ultrasound to be sensing. Some are affixed to the window of the corner, using glass broken vibration as active sensor. Because the glass broken sound and the interior glassware broken, the telephone bell, the alarm clock, the hot Kettle Ming, the outside knocking, the whistle, the motor and so on each kind of sound is difficult to distinguish, therefore uses the computer characteristic sound recognition CAIR Technology, the software control DSP and so on technology, distinguishes the alarm authenticity. Israel Visonic Company, the United States Detection Systems Company, Champ, K companies, etc. have a good product, installation is also very convenient, suitable for important and quiet indoor precautions.