PressurePores System Reduces Propellar Noise

PressurePores System Reduces Propellar Noise
The innovative PressurePores system reduces propeller sound to lessen the effects of underwater radiated noise on marine animals.

When a typical propeller spins underwater, it creates tiny bubbles that collapse and produce an audible shock wave up to 180 decibles—which can disturb marine life as far as 100 miles away.

As a way to reduce this underwater noise pollution, researchers from Strathclyde University and Oscar Propulsion created the PressurePores system. This technique sees small holes bored in specific locations in the propeller blades, reducing the cavitation volume (and therefore the audible sound) without significantly hampering

Image: Cavitation from a modified propellar.

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