Patent ID: 8794375

Claim:
A device for passively reducing the noise vibrations in a liquid resulting from a sound source which is arranged below the liquid level of a body of water, wherein the device comprises a noise-insulating pipe which is designed to be arranged around the sound source, the pipe comprising: a number of telescopically extendable and retractable pipe sections; and fastening means for attaching at least one first and one second pipe section to one another in the extended and/or retracted position, wherein the fastening means are designed to allow the mutual displacement of the pipe sections in a starting position and to attach the pipe sections to one another in a fastening position, and wherein the fastening means comprise one or more displaceable spacers which can be expanded in an axial and/or radial direction to keep the first and second pipe sections substantially acoustically disconnected in the fastening position; and guide means arranged between the first and second pipe sections for guiding the pipe sections during displacement with respect to one another, wherein the one or more displaceable spacers are designed to make contact between the guide means and an opposite pipe section possible in the starting position and to keep the guide means clear of the opposite pipe section in the fastening position.