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Testing ultrasonic antifouling scientifically by counting larvae




To know if and how effectively sonic antifouling works, we build test stands. Here in the lab at Zeeschelp, The Netherlands, there are three test plates in seawater with 500,000 specially raised superlarvae: one without our transducers, one with transducer type 1 and one with transducer type 2. For months we flush seawater saturated with special algae larvae along these plates. After that period, we scrape the plates bare, collect the residue from various locations within the experimental setup, and view it under the electronic microscope. Then the counting begins. A patient job that takes days. From the graph of March 11, there is a great result in which the difference between ultrasonically protected plates and those without transducers is clearly visible!


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