(under the class definition) Subject matter comprising an acoustic wave/electric signal transducer electrically connected to signal processing circuitry wherein the acoustic wave medium is water.
(1) Note. The electric signal processing circuitry of this subclass type includes any circuit which is used to deliberately alter the signal. Mere interconnection means such as transducer leads do not constitute signal processing circuitry of this subclass type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1, for sonar counter-measures.
2+, for transponders.
3+, for sonobuoy transponders.
7, for underwater acoustic image conversions.
12, for underwater beam stabilization or compensation. 15+, for offshore prospecting.
87+, for underwater echo systems.
117+, for underwater plural transmitters to receiver or transmitter to plural receivers system.
118+, for underwater distance or direction finding.
