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Seismic surveying is widely used in the marine environment to define and analyse subsurface geological structures, mainly by the oil and gas exploration and production industry. Seismic surveying utilises a technique that directs acoustic energy (sound) into the rock beneath the sea floor from equipment towed behind a purpose-built seismic vessel.

Sound is very important to whales and dolphins for effective hunting, navigation and communication. Toothed whales and dolphins (e.g killer whales and bottle nose dolphins) use natural sonar system (echolocation) for hunting and navigating Baleen whales (e.g humpback and blue whales) use sound for communicating over long distances by producing a series of sounds which are frequently termed songs.