Noise suppression during seismic exploration
US4750156A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Mar 3, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The system for suppressing an ambient noise signal which comtaminates a desired signal includes a noise pickup detector for detecting the ambient noise signal. A noise discriminator processes the detected noise signal into noise data. A reference noise generator converts the noise data into a reference noise signal. The noise generator automatically adjusts the reference noise signal to correspond with changes in the noise signal as it is being detected. A filter filters the reference noise signal into an error signal which is adapted to remove the noise signal from the contaminated signal. A cross-correlator cross-correlates the contaminated signal with the reference noise signal and adjusts the filter to produce the required error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.