The process of accumulating empirical data in scientific research on acoustic communication of cetaceans is entering the stage of actual experiment. We analysed ‘emotional’ signals of bottlenose dolphin (Tursiops truncatus) and beluga whale (Delphinapterus leucas) represented with non-equidistant sequences of short pulses ranging from 1.8 to 6 ms within the bursts of pulses 80 – 600 ms long. Broadband recording of ‘emotional’ signals of beluga whale revealed that spectral density of the recorded pulses could be up to 500 kHz and even more, which contradicts the common frequency-threshold characteristics of the receiving system of toothed whales.
43.80.Lb Sound reception by animals: anatomy, physiology, auditory capacities, processing
St. Petersburg 199034, Russia
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