Alarm system for detecting an audio signal when glass breakage occurs

An alarm detection system for detecting the presence of an audio signal when glass breakage occurs, said system comprising

• amplifier responsive to an input audio signal for providing an amplified audio output signal;
• filter means responsive to said audio output signal for providing one or more filtered audio signals;
• processing means responsive to said one or more filtered audio signals for determining when said filtered audio signals represent an audio input signal that has been generated due to glass breakage;
• means responsive to said determination for providing an alarm signal when said filtered audio signals represent an audio input signal that has been generated due to glass breakage;
• said amplifier means being further responsive to a uniquely characterized humanly generated input audio signal;
• and
• said processing means being responsive to filtered audio signals which result from said uniquely characterized input audio signal for placing said alarm system in a test mode of operations.

An alarm detection system for detecting the presence of an audio signal when glass breakage occurs, said system comprising

• amplifier means responsive to an input audio signal for providing an amplified audio output signal;
• filter means responsive to said audio output signal for providing one or more filtered audio signals;
• processing means responsive to said one or more filtered audio signals for determining when said filtered audio signals represent an audio input signal that has been generated due to glass breakage;
• means responsive to said determination for providing an alarm signal when said filtered audio signals represent an audio input signal that has been generated due to glass breakage;
• said amplifier means being further responsive to ambient input audio background noise signals having an amplitude above a selected level, said noise signals being generated in an environment in which said alarm system is placed;
• and
• said processing means responding to said ambient input audio background noise signals for turning on an indicator means when said ambient input audio noise signals are not present.

An alarm detection system for detecting the presence of an audio signal when glass breakage occurs, said system comprising

• amplifier means responsive to an input audio signal for providing an amplified audio output signal;
• filter means responsive to said audio output signal for providing one or more filtered audio signals;
• a single processor responsive to said one or more filtered audio signals for providing a first alarm indication for a selected time period when said filtered audio signals represent an audio input signal that has been generated due to glass breakage;
• means for monitoring the output of a second alarm system which detects the occurrence of a different intrusion event and provides a monitored signal when said different intrusion event accompanies the occurrence of a glass breakage event;
• said single processor detecting the presence of said monitored signal and providing a second confirmatory alarm indication different from said first alarm indication only when said monitored signal has been detected during said selected time period.