A system and method for testing a physical attribute of a manufactured object that includes a laser generator and pulse generator that generate a plurality of Dirac-like pulses. The pulses, directed at an object, cause a sonic signal to be initiated indicative of the physical attribute of the manufactured...http://www.google.com.au/patents/US6668654?utm_source=gb-gplus-sharePatent US6668654 - Method and apparatus for generating specific frequency response for ultrasound testing
