Suppression of air-coupled noise produced by seismic vibrators

Details Suppression of air-coupled noise produced by seismic vibrators Suppression of air-coupled noise produced by seismic vibrators

1989-03-30

1990-05-29

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

181108, G01V 102

Patent

active

049301136

ABSTRACT:
Air wave noise caused by a vibrating baseplate on a seismic vibrator is reduced or eliminated through active cancellation of sound. In active cancellation, the detection of acceleration of the baseplate is used to form a counterpart wave which is equal in amplitude but opposite in phase; a speaker produces an opposite air wave to cancel the baseplate air wave.

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"Ground Force Control of a P-Wave Vibrator," Sallas et al., SEG Seismic Field Techniques Workshop, Aug. 13-16, 1985, Monterey, Calif.
"Cancellation Process Uses `Anti-Noise` to Quiet Problem at Its Source," Chessher, Occupational Health and Safety News Digest, Oct. 1987.

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