These are often described as sounding like screams or a harsh metallic sound. They produce pulsed sounds and clicks at rates of up to 5000 per second. The sounds produced by an orca range from about 0.1 kHz to about 40 kHz. Clicks are used to sense their surroundings through echolocation, while they use whistles to communicate with other members of their species and very likely, with other species too. In general, dolphins make two kinds of sounds, “whistles” and “clicks” (listen to the false killer whales on this page). Researchers estimate that some of the lowest frequency sounds can travel through the ocean as far as 10,000 miles without losing their energy. Greatest sensitivity ranged from 18 to 42 kHz with the least sensitivity to frequencies from 60 to 120 kHz.Ī Traveling Music One of the interesting things about the humpback whale song is how far the song can travel. More recent studies show killer whales could hear sounds at frequencies as high as 120 kHz. How far can orcas hear?Įarly studies published in 1972 suggested that the hearing range of killer whales was about 0.5 to 31 kHz. When the sound waves bounce off of an object, they return to the whale, allowing the whale to identify the shape of the object. Clicks are believed to be for navigation and identifying physical surroundings. The three main types of sounds made by whales are clicks, whistles, and pulsed calls. At pure decibels, the sperm whale is louder than the blue whale because its clicks have been recorded at 230 decibels. Sperm Whale Although blue whales are considered by most to be the loudest animals, there are many ways to measure loudness. Sourceīroadband source level (dB re 1 Pa at 1m) The word “song” is used to describe the pattern of regular and predictable sounds made by some species of whales, notably the humpback whale….Sound levels. 11 Why are whales more dependent on sound than land mammals?īlue whales sound can be heard at a distance of over 500 miles (800 kilometres) – as long as you can hear that frequency (i.e.10 How are fishes and marine mammals use sound?.9 What kind of sound can you hear in the water?. 1 How far can a blue whale song be heard?.
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