Acoustic reflectors
AssigneeSubsea Asset Location Technologies Limited
InventorsCarl Peter Tiltman, Andrew Malcolm Tulloch
Life of this patent
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Abstract
An acoustic reflector comprises a shell surrounding a solid elastomeric core free of joints. The shell transmits acoustic waves incident on the surface of the shell partially into the core to be focused and reflected from an area of the shell located opposite to the area of incidence so as to provide a reflected acoustic signal output from the reflector partially around the circumference of the shell and to combine constructively with the reflected acoustic signal output. The ratio of the speed of sound wave transmission in the shell to the average speed of the wave transmission in the core is preferably in the range of 2.74 to 3.4 best results being in the range of 2.74 to 2.86 inclusive.
Claims8
An acoustic reflector comprising a shell surrounding a core, said shell having one or a plurality of acoustic windows through which acoustic waves incident on the surface of the shell are transmitted into the core, and in which acoustic waves entering the core are reflected from the shell opposite the window(s) back towards and through the window(s) and in which the core is a solid, in which the ratio of the speed of acoustic wave transmission in the shell to the average speed of acoustic wave transmission in the core is in the range 2.5 to 3.4 and in which the shell comprises two halves having rims around their edges, the rim of each half having upstanding portions overlapping one another form a joint therebetween.
Dependencies are inferred from the claim text.