Bats navigate by echolocation-- high frequency sound which is emitted by the bat, then bounces off of objects and is received by the ears of the bat. This gives bats a 3D sound picture. Bats typically emit 30 sounds per second countinuously while flying. When encountering an object, they emit 50-60 sounds/second. The sound frequency of bat echolocation is 30,000 cycles (the extreme upper limit of human hearing) to 60,000 cycles. |
examples of bat echolocation (frequencies lowered to human-audible frequencies) Antrozous pallidus (Pallid Bat) 1 Antrozous pallidus (Pallid Bat) 2 Antrozous pallidus (Pallid Bat) 3 Antrozous pallidus (Pallid Bat) 4 courtesy of UNM Batsound Library |