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Human-caused underwater noise that affects endangered Southern Resident killer whales comes from a variety of sources. These include recreational boaters, whale watch vessels, and large commercial vessels that transit Puget Sound and the Salish Sea every day. Now, a new program called Quiet Sound aims to better understand and reduce the effects of large commercial vessels on the whales in Washington state. Quiet Sound has five active projects, one of which is a seasonal voluntary slowdown of large ships which started in October 2022.
