How the brain filters out sounds

Bats are renowned for their echolocation skills, navigation using sound therefore: they 'see' with their extremely sensitive hearing, by emitting ultrasonic calls and forming a picture of their immediate environment on the basis of the reflected sound. Thus, for instance, Seba's short-tailed bat (Carollia perspicillata) finds the fruit it prefers to eat using this echolocation system. At the same time bats use their voice to communicate with other bats, whereby they then utilize a somewhat lower frequency range. Seba's short-tailed bat has a vocal range which is otherwise only found among songbirds and humans. Just like humans it creates sound via its larynx.