Attenuating shear wave noise in marine seismic streamers

摘要

A marine seismic streamer has hydrophone housings 19 positioned in the streamer, the hydrophone housings having ends 22 and rigid side walls 21. Openings 35 in the hydrophone housings 19 are provided which substantially permit passage of pressure waves to the hydrophone 17 but substantially attenuate passage of shear waves. The openings may be the in the end walls 32 or the side walls 21 of the housing, or alternatively the openings may be provided by providing the housing with open ends. A soft compliant solid material 18 may be provided to fill the housing and the openings in the housing. The openings are dimensioned to act as shear wave attenuation ports, the dimensions being dependent on the viscosity and shear modulus of the soft compliant solid filler material.