Acoustic direction finder

Details Acoustic direction finder Acoustic direction finder

G - Physics

01

S

349/25, 349/32

G01S 15/00 (2006.01) G01S 3/802 (2006.01) H04R 1/40 (2006.01) H04R 1/44 (2006.01)

Patent

CA 1037154

ABSTRACT OF THE DISCLOSURE An acoustic direction finder which identifies and displays bearing of an underwater received signal without the requirement of scanning the ambient space. The output signals of hydrophones at the ends of a pair of orthogonally located dipoles are applied to differential amplifiers to provide orthogonal dipole response characteristics, and an in-phase sum of the signal at the centre of the dipoles is obtained. A common signal is obtained either by differen- tiating the sum signal relative to the differential amplifier output signals or by retaining the sum signal and integrating the differential amplifier output signals. The resultant signals are applied to individual multiplying means with the common signal whereby a pair of X and Y coordinate deflection signals are obtained, which are applied to a display device.

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