Hi...

When bats are together in a cave how they protect themselves agains harms
of high frequence sounds of other bats.(I know the mechanism of protetion
against their own sound but how they do it agains others sound that they
don't know when it will be produced)

My second queston is: Why we cant hear their sounds?
why we cant hear high frequence sounds despite some animals can?

Thank you so much.

see
http://www.todayifoundout.com/index.php … ats-sonar/