Patent ID: 8050143

Claim:
A system for generating a threat alert in an infrastructure component comprising: a plurality of acoustic sensors disposed in a protected zone around the infrastructure component, wherein each of the plurality of sensors is configured to detect a signal corresponding to an outcome that causes damage to the infrastructure component; a processing circuitry coupled to each of the plurality of acoustic sensors, the processing circuitry comprising: at least one analog-to-digital converter configured to digitize the signal; a digital signal processor configured to process the acoustic signal in a sequential routine, the routine comprising: a noise filtering routine configured to filter background noise from the acoustic signal and generate a filtered signal, the noise filtering routine comprising: a Wiener filter configured to compare the acoustic signal with a database of acoustic signals of a plurality of vehicles and output a Wiener filter error based upon comparison; a spectral subtractor configured to compare the acoustic signal with a database of noise signals and output a spectral subtractor error; and a decision process module configured to output an estimated source signal to the source identification routine when a combination of the Wiener filter error and the spectral subtractor error is within an acceptable range. a source identification routine configured to identify a source generating the acoustic signal based upon the filtered signal; and a threat analysis routine configured to detect a threat based upon the source identified and generate a threat level signal; and a remote monitoring center configured to receive the threat level signals from the processing circuitry and transmit an alert message to a concerned authority via a communication link.