Attenuating out of band energy emitted from seismic sources

摘要

A seismic source for marine seismic acquisition, comprising: a barrel; a piston disposed inside the barrel; a gas supply coupled to the barrel, wherein the gas supply provides a gas at ambient pressure inside the barrel; an axis bar coupled to the piston, wherein the axis bar is configured to move the piston across the barrel; and an actuator coupled to the axis bar, wherein the actuator controls an axial motion of the piston. 6291005_1 (GHMatters) P88384.AU.1 SARAHVV 11/03/2015 INITIAL DURING STATE ACTUATION