![]() ![]() ![]() This population produces long-duration, low frequency pulses ("A") and tonal calls ("B"), upswept tones that precede type B calls ("C"), moderate-duration downswept tones ("D"), and variable amplitude-modulated and frequency-modulated sounds. Vocalizations produced by the Eastern North Pacific population have been well studied. Additionally blue whales off the coast of Sri Lanka have been recorded repeatedly making "songs" of four notes duration lasting about two minutes each, reminiscent of the well-known humpback whale songs.Īll of the baleen whale sound files on this page (with the exception of the humpback vocalizations) are reproduced at 10x speed to bring the sound into the human auditory band. Blue whale calls last between ten and thirty seconds. All blue whale groups make calls at a fundamental frequency of between 10 and 40 Hz, and the lowest frequency sound a human can typically perceive is 20 Hz. (1995) suggest that source level of sounds made by blue whales are between 155 and 188 decibels with reference to one micropascal metre. The precise mechanism differs in the two major suborders of cetaceans: the Odontoceti ( toothed whales-including dolphins) and the Mysticeti ( baleen whales-including the largest whales, such as the blue whale).Įstimates made by Cummings and Thompson (1971) and Richardson et al. These pockets are shaped by the throat, tongue, and lips into the desired sound.Ĭetacean sound production differs markedly from this mechanism. The vocal cords within the larynx open and close as necessary to separate the stream of air into discrete pockets of air. Humans produce sound by expelling air through the larynx. The word " song" is used in particular to describe the pattern of regular and predictable sounds made by some species of whales (notably the humpback) in a way that is reminiscent of human singing. Whale vocalizations are the sounds made by whales to communicate. Spectrogram generated with Fatpigdog's PC based Real Time FFT Spectrum Analyzer. The ethereal whale songs and echolocation clicks are visible as horizontal striations and vertical sweeps respectively. Detail is shown for the first 24 seconds of the 37-second recording of humpback whale song. Spectrogram of humpback whale vocalizations. ![]()
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