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14:50
TPO 7 Lecture 2 Biology
l Pro: So, that is how elephant uses infra sound. Now, let‘s talk about the other
and the acoustic spectrums, sound that is too high for humans to
hear---ultrasounds. Ultrasound is used by many animals that detected and
some of them seen(sent) out very high frequency sounds. So, what is a good
example? Yes, Kayo.
Kayo: Well, bats, since there is (they are )all blind, bets have to use sound for, you know,
to keep them from flying in the things(in to things ).
Pro: That is echolocation. Echolocation is pretty self-explanatory; using