Lewie M. Barber - Austin TX Bernie R. Criswell - Austin TX Allen G. Findeisen - Austin TX Benjamin F. L. Weiss - Austin TX
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 380 G01S 1500
US Classification:
367125
Abstract:
An underwater combination of a passive and an active acoustic mechanism is sed to detect and locate a surfaced or submerged object or target. The passive mechanism utilizes a pair of separated hydrophones to detect an object. The hydrophones are then followed by bandpass filters according to the frequency of interest and the outputs thereof correlated to locate the object. A positive correlation output indication initiates the active acoustic mechanism which then verifies the detection of an object by transmitting a pulse sonar. The output of a transducer responsive to the reflected pulse sonar is then analyzed to indicate whether the detected object is surfaced or submerged and whether the detected object is approaching, departing or stationary.
Lewie M. Barber - Austin TX Bernie R. Criswell - Austin TX Ruell F. Solberg - Austin TX Benjamin F. L. Weiss - Austin TX
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H04R 1700 H04R 134
US Classification:
367151
Abstract:
An acoustical line array transducer reflector system for producing conical hell radiation patterns. One side of the ground plane reflector of the system is covered with a chloroprene rubber-cork composition. Three transformers in ferrite cup cores are wired to the line array transducer elements.