US PATENT SUBCLASS 702 / 17
.~.~.~ Filtering or noise reduction/removal

Current as of: June, 1999
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702 /   HD   DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING

1  DF  MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6}
2  DF  .~ Earth science {4}
14  DF  .~.~ Seismology {4}
17.~.~.~ Filtering or noise reduction/removal

DEFINITION

Classification: 702/17

Filtering or noise reduction/removal:

(under subclass 14) Subject matter comprising means for removing certain frequency components of the seismic signal or means for lessening or eliminating disturbance in the seismic signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

111, for a testing system having noise signal stimulus.

191+, for signal extraction or separation including filtering or noise eliminating, and particularly subclass 195 for noise removal or extraction by subtracting noise component.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

551+, for unwanted signal suppression.

367, Communications, Electrical: Acoustic Wave Systems and Devices,

43+, for filters in land-reflection type seismic prospecting.