A method and apparatus are disclosed for generating intense acoustic pulses by means of the water hammer effect. The method involves generating a water hammer in a conduit by suddenly interrupting a high velocity flow of fluid through the conduit. The kinetic energy of the fluid flowing in the conduit...http://www.google.ca/patents/US5459699?utm_source=gb-gplus-sharePatent US5459699 - Method and apparatus for generating high energy acoustic pulses
