Patent ID: 6041888
Filing Date: 2000-03-28
Classification: G01V,G10K,H04R,Y02A

Abstract:
Acoustic source having a longitudinal axis, especially for use in seismic studies at sea, with sound emitting surfaces adapted to be put into sound emitting movements towards and away from each other by use of a drive unit in which the sound emitting surfaces comprise two curved plate members essentially symmetrically positioned in relation to the longitudinal axis of the source, forming a convex cross section with their respective upper and lower edges converging towards each other, and the respective upper and lower edges of the sound emitting surfaces are flexibly connected to two corresponding side elements positioned between the upper and lower edges of the sound emitting surfaces,characterized in that the source comprises a rigid frame for supporting the drive unit comprising at least two rigid slide rods stretching through the side elements and permitting relative axial movement of the slide rods with respect to the side elements, and that rigid covers having outer edges are mounted on the slide rods, covering at least the whole side elements, thus forming rigid, covering surfaces with a constant distance between the covers.