ABSTRACT
Passive sensing of acoustic sources is attractive in many respects, including the relatively low signal bandwidth of sound waves, the loudness of most sources of interest, and the inherent difficulty of disguising or concealing emitted acoustic signals. The availability of inexpensive, low-power sensing and signal processing hardware enables application of sophisticated real-time signal processing. Among the many applications of aeroacoustic sensors, we focus in this chapter on detection and localization of ground and air (both jet and rotary) vehicles from ground-based sensor networks. Tracking and classification are briefly considered as well.
