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Title
Animal acoustics: This whale goes to 11.
Abstract
The article discusses how the killer whale, Orcinus orca, keeps track of members in its pod. Marla Holt and colleagues, from the Northwest Fisheries Science Center in Seattle, measured the calls of killer whales in Puget Sound, which contains a high volume of sound from motorized boats. The team used a series of omnidirectional hydrophones to measure the amplitude of the whale's calls in relation to the increasing background noise.