To know if- and how effectively- sonic antifouling works, we build test stands. Here in the lab at Zeeschelp, the Netherlands, there are 8 test plates in 2 basins with seawater and with 500,000 specially raised mussel larvae in each. And one set of plates with our transducers, and one set without. For weeks we pump seawater saturated with special algae through these basins. After all larvae have transformed and settled, we ‘harvest’ the microscopic small mussels from the plates and the basins. Then 1 ml samples are prepared and put under the electronic microscope. Now it is time to count and measure. A patient job that takes days. Look at the graph of March 11, a great result. The difference between ultrasonically protected plates and those without transducers is clearly visible!
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