The Voice of the Dugong







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Dugong's Voice





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Listen to the following sequence of dugong squeaks and barks. It is in the common MP3 format.Dugongs make chirp and bark like sounds, in mother-calf communication and during mating. It is believed that infrasound, which is sound below the human hearing limits, is also used.This is a spectrogram, the graphic representation of a high pitch squeak.It shows four (two more unclear) harmonic bands below 10 kHz.This is a hoarse, bark like call, there are no harmonic bands, frequency below 4 kHz.(Sound of the Toba Aquarium male grabbed from TV, hence some background noise. Spectrograms made with Avisoft-SASLab Light)Compare this with the voice of a Manatee. Not unexpectedly it is composed similarly to that of the Dugong, however, it has a greater frequency range, 20 kHz and more.(the green bottom is caused by background noise)On the following pages you find details and more spectrograms of manatees voices:and