ABSTRACT
Localization of acoustic source is necessary in pinpointing the region of crack initiation in a structure, or identifying the point where a structure may have been hit by a foreign object. Developing more efficient acoustic source localization (ASL) techniques is a topic of active research which is continuously evolving. This chapter discusses different ASL techniques developed in last few decades. Most published papers that introduce a new ASL technique emphasize the advantages of the introduced technique while hardly mentioning the limitations of the new technique. The triangulation technique is the most popular source localization technique for isotropic and homogeneous structures. T. Kundu et al. then experimentally verified the technique for plates made of both isotropic and anisotropic materials. D. Guyomar et al. proposed a technique based on the Poynting vector analysis from which one can predict if the acoustic source is inside or outside a specific region and can give an estimate of the strength of the source.
