Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1982-03-05
1984-05-22
Tudor, Harold J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310335, H04R 1700
Patent
active
044505426
ABSTRACT:
A compact apparatus for transmitting and receiving multiple sonar beams utilizes an acoustic lens to direct plane waves incident in desired directions to electroacoustic transducers positioned on spherical shell segments centered in the focal regions of the lens associated with the incident beams. The electroacoustic transducers transmit spherical waves that are transformed by the acoustic lens to plane waves emergent in the desired directions.
REFERENCES:
patent: 3663842 (1972-05-01), Miller
patent: 3687219 (1972-08-01), Langlois
patent: 3776361 (1973-12-01), Rolle
patent: 3800276 (1974-03-01), Rishell
patent: 3866711 (1975-02-01), Folds
patent: 3979565 (1976-09-01), McShane
Doppler Sonar Velocity Log for Attack Submarines, by Wapner et al., IEEE Position Location and Navigation Symposium, Atlantic City, N.J., Dec. 8-11, 1980.
Johnston Ralph A.
Sperry Corporation
Terry Howard P.
Tudor Harold J.
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