Usually its actually echolocation . But they use to hunt for prey ( their food ) .
bats have bad eyesight so they use their echo ultrasound and big ears to reflect sound and tell if there is something in front of them so that they can see similar to how a cats wiskars work
Ultrasound sound waves
because is dark in the sea, so the dolphins can't see. the dolphins use ultra sound to navigate and to hunt for pray, like a bat does.
Bats, as one may know, are blind, and to find it's prey (food) it causes ultrasound, which is invisible of course, imagine a wave, in the ocean, the waves hit something, and the wave is directed back to where it came from, and anything the wave does not hit, continues. That is how bats use ultrasound to hunt.
Animals use ultrasound but i do not know what animals do,
they listen out for sounds and the ultrasound hits the prey and comes back to the bat
Doctors use ultrasound to check the health of an unborn baby.
yes when you get an ULTRASOUND when your pregnant it use ultrasound waves to show the image.
They emit a sound that bounces off surroundings and makes it's way back to the bat. It can then navigate itself around trees, other animals, and etc.
Ultrasound is below the threshold of human hearing. Howler monkeys use ultrasound because it travels much further than higher frequencies.
ultrasound
Ultrasound