NOISE CONTROL COMPOSITE
Assignee
US Government
Filed as: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Filed
Aug 31, 1982
Granted
May 30, 1995
Location
ARNOLD MD US
Abstract
A composite for use on submarines and surface craft for controlling self-erated noise when listening with sonar. The composite includes two layers of PVF2 transducers separated by a layer of phase shifting or absorbing material. The inner transducer senses noise from the ship and subtracts this from the signal from the outer transducer representing noise plus the desired signal. In a second mode the sensed noise is regenerated through the outer transducer 180° out of phase to cancel the noise and allow more accurate detection.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 6, 1983
Rescinded
Sep 7, 1994
Duration
11 years, 8 months
Inventor
- 1EUGENE C. FISCHER
Record Details
- Patent number
- US 5420825
- Application
- 06413952
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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