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determination of the position of an object by measuring the time taken for an echo to return from it and its direction



the perception of reflected sound waves, usually high-frequency, by certain animals, which emit them to detect objects in space, such as prey or obstacles, and determine their properties and dimensions. Echolocation is one of the means by which animals orient themselves in space. It is developed in bats and dolphins and has been discovered in shrews, a number of species of seals, and birds, including oilbirds and salanganes.

In dolphins and bats, echolocation is based on the emission of ultrasonic impulses with frequencies of as high as 130–200 kilo-hertz (kHz) and duration of signals usually from 0.2 to 4–5 milliseconds, sometimes more. In birds that live in dark caves, such as oilbirds and salanganes, it is used for orientation in the dark; they emit low-frequency signals of 7–4 kHz. Dolphins and bats use echolocation not only to determine their general orientation, but also to determine the spatial position of an object and its dimensions. In a number of cases echolocation even enables them to recognize the appearance of an object and therefore often serves as an important means of searching out and capturing food.


Airapet’iants, E. Sh., and A. I. Konstantinov. Ekholokatsiia v prirode, 2nd ed. Leningrad, 1974.



An animal's use of sound reflections to localize objects and to orient in the environment.
References in periodicals archive ?
We are using the echo-location models that he developed over his 20 years of research.
Other times, they don't rely on echo-location at all but instead "rake" the surface by dragging their claws in the water to snare any fish available, Kalko0 and her colleagues will report later this year in BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY.
R) kick off on Wednesday, August 2, with fascinating stories from around the world, including a 7-year-old body builder; a wolf family whose members are covered from head to toe with thick, dark hair; and a real-life "Bat Man," who has overcome his blindness by using the bat-like technique of echo-location.
The echo-location call of longeared bats is very quiet, so identifying them in the field can be difficult.