Jette Hope|jette at ofshepherdshope.nl|Self|.|OrcaSound Hydrophone|2009|august|17|20|32|.|.|.|.|.|.|.|SRs|.|.|N|After hearing them at LK hydrophone, and heared them for about half an hour, I tuned back to the OrcaSound hydrophone. Hearing some clicks and a few calls, getting closer, though.