Abstract: A method of adjusting a sensitivity of an acoustic detector. The acoustic detector receives a signal from a remote device. The signal embodies an operating instruction for the acoustic detector. The signal is decoded into an operating instruction for the acoustic detector. The sensitivity of the acoustic detector is adjusted according to the operating instruction. The acoustic detector can increase or decrease the sensitivity. After the sensitivity is adjusted, the acoustic detector sends a confirmation of the adjustment to the user.

Abstract: An intrusion detector for a security system that detects the breaking of a glass in a window or a door and motion within a protected area is provided. The intrusion detector includes a single sensing section, a first filter, a second filter, a microprocessor, and an alarm generating. The microprocessor includes a motion detection section, an activation section for activating the motion detection section for a preset period of time only when a detected acoustic signal is consistent with that required to break glass, and a timing section for timing the preset period. The sensing section is capable of sensing motion induced signals during both activation and non-activation of the motion detection section, but the motion detection section ignores motion-induced signals during non-activation of the motion detection section.

Abstract: A method and system for automatically adjusting a sensitivity of an acoustic detector. The method comprises receiving an acoustic signal from a remote device, detecting the unique pattern embedded therein, changing a mode of operation based upon the detection, measuring a voltage created by the reception of the acoustic signal and adjusting the sensitivity of the acoustic detector based upon a measured voltage. The acoustic signal contains a unique pattern indicative of the remote device.

Abstract: An intrusion detector and method for detecting both the breaking of a glass in a window or a door and motion within a protected area. The detector comprises a single sensing section for detecting mechanical impact in a form of an acoustic signal on the window or glass and for detecting motion in a form of a motion induced signal within a protected area, a lens for focusing the motion induced signal, a first filter for filtering out a portion of the motion induced signal which is not in a preset frequency band, a second filter for attenuation a portion of the acoustic signal outside a second preset frequency band, a microprocessor for determining if the detected acoustic signal is consistent with that required to break glass and if the detected motion induced signal is indicative of motion with the protected area, and an alarm generating section for generating an alarm based upon the determination of the microprocessor.

Abstract: A battery-powered RF sensor is provided for use in security and alarm systems for monitoring alarm state conditions, and transmitting an alarm state detection signal upon detection of an alarm state condition. The RF sensor is constructed to include an RF transmitting portion, a battery, a low-battery voltage level detection portion and a counter for periodically detecting an output voltage level of the battery, and comparing the voltage level to a first threshold voltage. If the detected battery output voltage level is determined to be less than the first threshold voltage, the low- or depleted-battery state is not immediately reported, but is reported at another time if the low-battery condition persists. That is, the low battery condition would preferably not be reported until daytime hours, other than for a dead battery condition.

Abstract: A method and system for automatically adjusting a sensitivity of an acoustic detector. The method comprises receiving an acoustic signal from a remote device, detecting the unique pattern embedded therein, changing a mode of operation based upon the detection, measuring a voltage created by the reception of the acoustic signal and adjusting the sensitivity of the acoustic detector based upon a measured voltage. The acoustic signal contains a unique pattern indicative of the remote device.

Abstract: A method of adjusting a sensitivity of an acoustic detector. The acoustic detector receives a signal from a remote device. The signal embodies an operating instruction for the acoustic detector. The signal is decoded into an operating instruction for the acoustic detector. The sensitivity of the acoustic detector is adjusted according to the operating instruction. The acoustic detector can increase or decrease the sensitivity. After the sensitivity is adjusted, the acoustic detector sends a confirmation of the adjustment to the user.

Abstract: A sensor has a reduced probability of generating a false alarm in the presence of a strong high frequency acoustic wave, such a false alarm being caused by the saturation of the microphone which is part of a single microphone glass break sensor. The sensor improves an alarm system's immunity to false alarms by using two microphones instead of one, wherein each microphone is used in combination with a filter and a signal processing stage to detect one of the characteristic components of an acoustic wave generated in a glass break event. The microphone used to detect the low frequency component is fitted with an acoustic filter which attenuates the high frequency component of the wave. This reduces the probability of a false alarm by ensuring that the low frequency electrical signals fed to the alarm system's logic and timing circuit are generated by an external event rather than by the microphone itself.