The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2001
Filed:
Oct. 31, 1997
Charles Geoffrey Rice, Sugar Land, TX (US);
Paul Ellington Carroll, Houston, TX (US);
Thomas Glen Ragan, Sugar Land, TX (US);
Input/Output, Inc., Stafford, TX (US);
Abstract
A method and an apparatus are provided for matching the response of hydrophones,to the response of geophones,and significantly reducing response variations between hydrophones caused by inherent characteristics. The method includes the steps of determining a capacitance,for each of the hydrophones,in an operating environment, configuring a filter,based on the capacitance,, and modifying a response of a channel of the hydrophone,using the filter,. The apparatus includes an acquisition unit,having a geophone,and a hydrophone,, a recording unit,, a processing unit,and a filter,for correcting for variation between hydrophones,and changing a first order low frequency response of the hydrophone,to appear like a second order response like that of the geophone