9 Seal integrity inspection system, namely an opto-acoustic apparatus that focuses sound waves, principally comprising transducers, receivers, signal generators, computers and software for opto-acoustic imaging for inspecting sealed containers, pouches, trays, blister packages, and cups to verify seal integrity and to detect defects such as lack of heat seal, misplaced lidding or top web layer, or faults along heat seal width such as channel voids, contaminants, and inclusions