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Sperm whales (Physeter macrocephalus) generate a series of broadband impulsive echolocation signals called clicks when diving in search of prey. These acoustic signals can be divided into usual clicks and creak clicks. They have a frequency spectrum that lies primarily between 2 and 18 kHz. In this paper, an adaptive energy-based click detector called the adaptive Teager energy operator (ATEO) is...
In this paper, the problem of underwater acoustic source localization using a single hydrophone is considered. The transmitted signal arrives at the hydrophone through the direct path and surface and bottom reflected paths. These multipath signals are used to define virtual hydrophones above the ocean surface and below the bottom for the purposes of source localization. An autocorrelation estimator...
Sperm whales (Physeter macrocephalus) can dive in search of food to a depth of over 1500 m and return to the surface within approximately 90 minutes. This makes conventional visual observation methods impractical to locate and track these animals. However it is possible to use an acoustic method for this purpose since a diving whale produces a series of loud impulsive acoustic signals or ‘clicks’...
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