Patent ID: 6473364
Filing Date: 2002-10-29
Classification: H04B

Abstract:
An apparatus to extend the high frequency response of a mine emulation system comprising:a watertight buoyant housing having cover and base portions, said housing being buoyed away from a mine evaluation system; a first acoustic sensor extending through said cover portion of said housing to provide an omni-directional response to higher frequency acoustic signals impinging through ambient water; a second acoustic sensor extending through said cover portion of said housing and adjacent to said first acoustic sensor, said second acoustic sensor to provide a directional response to said higher frequency acoustic signals impinging through said water; processing circuits on a circuit board mounted on said base portion to receive signals from said first and second acoustic sensors and generate signals representative of said omni-directional response and said directional response; and a cable extending to said mine emulation system to feed said representative signals thereto for additional processing.