Tag: Underwater Noise

Bold strides towards URN reduction
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Bold strides towards URN reduction

Imagine that whenever you ate, slept or made a phone call, a nearby construction team pulled out their jackhammers and started working. This is the everyday experience of countless marine creatures. Whales, dolphins, seals and millions of other underwater species are routinely affected by Underwater Radiated Noise (URN[1]). In-service ships emit a wide range of...

KONGSBERG noise reducing tech offered to commercial ships
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KONGSBERG noise reducing tech offered to commercial ships

KONGSBERG’S Blade Air Emission technology used in naval applications is now available for commercial ships to reduce the effect of underwater noise on marine life. The Blade Air Emissions concept significantly reduces cavitation-induced noise and erosion risk by machining a channel into the leading edge of the propeller blades. The concept, which applicable to conventional...

New propeller technology reduces cavitation by 14 per cent
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New propeller technology reduces cavitation by 14 per cent

A new technology that reduces propeller cavitation volume by nearly 14 per cent and underwater radiated noise (URN) by up to 21dB has been developed by Strathclyde University and Oscar Propulsion, a UK-based innovation and technology transfer company. The patented Oscar PressurePores system reduces propeller tip vortex cavitation by applying a small number of strategically...

LR launches airborne noise notation for ships in ports
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LR launches airborne noise notation for ships in ports

Lloyd’s Register (LR) has released a new airborne noise emission notation (ABN) and ShipRight procedure to meet demand for a standard and methodology to control airborne noise emissions from ships. The new notation defines a set of limit levels for airborne noise emission from ships. This enables ports to better monitor overall noise levels from...

Getzner Werkstoffe offers sound-control solution for ships
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Getzner Werkstoffe offers sound-control solution for ships

Sound control on-board ships to protect underwater life from vessels’ vibrations is an increasingly important concern for shippers. Presenting at the University of Rostock on February 21, Stefan Lukossek from Getzner Werkstoffe explained that flame-retardant vibration protection components in the floor construction can enhance sound control, as well as improve comfort on-board. Getzner has developed...

LR announces new underwater noise notation
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LR announces new underwater noise notation

Lloyd’s Register (LR) has launched a new underwater noise notation and ShipRight procedure on underwater radiated noise. The notation is designed to help shipowners and operators minimise underwater noise emissions when operating in sensitive environments, while the LR ShipRight procedure will see LR work with shipowners during the design phase to predict and control underwater...