Ultrasonic antifouling works in two ways. First by preventing attachment of new fouling to the surface of the hull. The second function is the disruption of reproductive and life cycles of organisms attempting to populate the surface. It’s important to remember that an ultrasonic system will not reverse existing fouling – the effects of ultrasonic antifouling are preventative.
Implementation of Ultrasonic Antifouling
Contrary to audible sound waves which can travel great distances through the air, ultrasound is most effectively transmitted through rigid surfaces. Consider ground penetrating radar – ultrasound can be utilized to create mapped images of depths over 100 feet through solid rock. Likewise, the ultrasound produced by Hull Shield systems must be past directly into the surfaces that are to be protected. To do so, emitters are bonded directly to the hull surface at evenly spaced intervals. These emitters are connected to a fully automatic control unit that generates signals within targeted frequency bands.
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