Echolocation is the same as active sonar, using sounds made by the animal itself. Ranging is done by measuring the time delay between the animal's own sound emission and any echoes that return from the environment. The relative intensity of sound received at each ear as well as the time delay between arrival at the two ears provide information about the horizontal angle (azimuth) from which the reflected sound waves arrive.
ABOUT: They took advantage of their feelings/ They rubbed their skin until their skin dissolved/ And fell on the floor as tales of nostalgia/ But the future is a better guide/ To the present than the past/ So they developed counter algorithms/To build and island called/ Suburbs of Utopia/ There will be free chocolate with caramel sea salt/Free health care and a thousand sexes/A universal basic income/And art that does not/ Refer to the familiar/ But to the New [INRA].