Patent ID: 7319392

Claim:
A glass breakage detector comprising: a. an acoustic transducer for sensing first acoustic waves and for providing a first analog signal representative of the received first acoustic waves, b. an analog to digital converter circuit adapted to convert the first analog signal to a digital signal; c. processing circuitry adapted to i. process the digital signal to determine if the received first acoustic waves are a result of glass breakage; and ii. generate an alarm signal when it is determined that the received first acoustic waves are a result of glass breakage; d. a memory circuit; wherein the processing circuitry is adapted to cause the memory circuit to store the digital signal for subsequent retrieval and analysis; e. a digital to analog converter adapted to convert a digital signal stored in the memory circuit to a second analog signal; and f. a speaker adapted to convert the second analog signal to second acoustic waves; wherein the processing circuitry is further adapted to i. retrieve a previously stored digital signal from the memory circuit, and ii. cause the digital to analog converter to convert the digital signal to a second analog signal for conversion to second acoustic waves suitable for being heard locally by an observer of the glass breakage detector.