Communications – electrical: acoustic wave systems and devices – Sonar counter-measures
Patent
1946-04-21
1980-04-29
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Sonar counter-measures
35 104, H04K 300
Patent
active
042008590
ABSTRACT:
1. In combination in electronic apparatus for simulating the self-noise of submarine, means for generating a wide-band noise signal, means for modulating the noise signal at a frequency corresponding to the propeller speed of a submarine, means for generating a signal at the frequency of the tooth impacts of the main drive gear of a submarine, and amplifying and output means for both said tones.
REFERENCES:
patent: 1401288 (1921-12-01), Sodeau et al.
patent: 1673002 (1928-06-01), Fearing
patent: 1892431 (1932-12-01), Hammond, Jr.
patent: 2395679 (1946-02-01), Neuhof
patent: 2397107 (1946-03-01), Hammond
patent: 2413350 (1946-12-01), Helmore
patent: 2710458 (1955-06-01), Reed
Bradley Clark F.
Evans David J.
Farley Richard A.
Rubens G. J.
The United States of America as represented by the Secretary of
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