Figure - available from: Biodiversity and Conservation
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Area under protection across EU27 countries for strictly protected areas. Cumulative area under protection (%) for each country is shown for all strictly protected areas in the upper panel and for the 3 different IUCN categories (Ia, Ib, and II) in the lower panels
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In the active sound control problem, additional sound sources, known as control sources, are implemented at the perimeter of a protected domain. The control sources can generate secondary sound inside the shielded domain, which attenuates incoming noise. This leads to an inverse source problem. Such a problem becomes much more complicated if some d...
