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The whistle repertoires of some dolphin species have been characterised and classified both qualitatively and quantitatively [1, 2, 3, 4, 5]; however, given the extensive range of the species relatively little is known about the acoustic repertoire of the Indo-Pacific humpback dolphin, Sousa chinensis [6, 7], particularly those in South-east Asia. Quantitative classification methods have been developed...
Bubbles are powerful and complex sound scatterers in water because of the impedance mismatch at each water-air/gas interface. Bubbles are formed by natural processes that include rainfall, gas emission from the sea bed, boat wakes, living or decomposing organisms, and wave breaking- the latter being the dominant cause of bubble entrainment in the surf zone. Despite the complications of sound propagation...
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