Acoustic sensors for detecting shooter locations from an aircraft

An airborne shooter detection system for an aircraft, comprising

• a plurality of sensors spaced apart on the surface of the body of an aircraft configured for receiving acoustic signals indicative of one or more characteristics of a shockwave of a projectile, wherein the plurality of sensors are coupled to the body of the aircraft, and at least one of the plurality of sensors including:
• a piezoelectric element, for generating analog electrical signals indicative of the acoustic signals,
• a non-rigid element, disposed between the sensor assembly and the cartridge, and
• a substantially nonporous cover, disposed over and mechanically coupled to the piezoelectric element and extending over the opening of the cartridge such that acoustic signals are transferred to the piezoelectric element;
• and
• conversion circuitry for receiving analog electric signals from the piezoelectric element and converting the analog electric signals to digital electrical signals;
• and
• a processor in communication with a plurality of sensors configured for unambiguously determining the location of the source of the projectile based on the digital electrical signals.