Noise reduction on geophone data using microphone records

Details Noise reduction on geophone data using microphone records Noise reduction on geophone data using microphone records

G - Physics

01

V

G01V 1/36 (2006.01)

Patent

CA 2291333

There is proposed use of microphone recordings of air waves, recorded close to a geophone, to suppress air-wave and surface-wave noise on the geophone. The types of air-wave noise on the geophone may include air-coupled ground roll, air blast, ground- coupled air blast and wind noise. Microphone recordings of air waves are related to ground measurements and geophone disturbances. The air wave may be used to filter the geophone data. Tests on recordings from the Calgary General Hospital implosion on October 4, 1998 indicate success in reducing noise on the geophone data. There is further proposed a geophone with an attached microphone to reduce noise on the geophone data. In addition, a geophone attached to a microphone could be used to reduce ground motion noise on the microphone.

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