Device for attenuating underwater sound pressure and the use of such a device
AssigneeAlfa Laval Rotterdam B.V.
InventorPieter Karel Anton Kapteijn
Life of this patent
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Abstract
A device for reducing underwater sound energy and propagation, whereby the device includes at least one bubble generation unit and an air conduit for supplying pressurized air to the bubble generation unit, whereby the bubble generation unit has a fluidic oscillator for generating one or more pulsating air flows from a constant air flow, and whereby preferably the fluidic oscillator has an adjustable oscillation frequency, and a method for using such a device for reducing underwater sound propagation, whereby the air conduit and the bubble generation unit are placed underwater, whereby pressurized air is supplied to the air conduit and whereby air bubbles are generated by the bubble generation unit.
Claims13
A device attenuating underwater sound pressure, comprising:
- at least one bubble generator;
- and
- an air conduit configured for supplying pressurized air to the bubble generation unit,
- wherein the at least one bubble generator comprises a fluidic oscillator for generating one or more pulsating air flows from a constant air flow,
- wherein the fluidic oscillator is a fluidic oscillator with an adjustable oscillation frequency, wherein the oscillation frequency of the fluidic oscillator is adjustable independently of the air pressure in the air conduit, and
- wherein the device comprises a hydrophone and a controller, the controller being arranged to receive an input signal from the hydrophone and to send to the fluidic oscillator a control signal for controlling the oscillation frequency, wherein the controller is arranged to calculate the control signal using the input signal.
Dependencies are inferred from the claim text.