Scientists from NOAA's Southwest Fisheries Science Center are participating in a Navy sponsored study known as SOCAL-10, Biological and Behavioral Response Studies of Marine Mammals in southern California. SOCAL-10 is designed to measure the response of cetaceans to Navy mid-frequency sonar and, potentially, other sounds sources. Whales are tagged with devices to record sound levels, position, depth and behavior and are then followed for at least an hour as a control period. Whales are then exposed to sounds (either simulated Navy sonar or white noise) from a powerful transducer that was built for this study. Focal-follow studies continue during and after the sound exposure. When the suction-cup tags fall off the animals, data are downloaded for future studies of their responses to the sounds. This project is a collaboration with researchers at NOAA, Cascadia Research, Duke University, Woods Hole Oceanographic Institute, and Scripps Institution of Oceanography, as well as Navy researchers. Click here for more information as well as daily blog kept by researchers at SEA (Southall Environmental Associates).