"Researchers at the University of Southern Denmark investigated the noise-making techniques of Daubenton’s bat, a small species of the winged mammal found across Europe and Asia. The study, published Tuesday in the journal PLOS Biology, focuses on the different structures of the larynx — also known as the voice box — that bats use to expand their vocal range.

Vocal communication is essential for bats: They famously use sound to navigate their surroundings and locate their prey in a process known as echolocation. The flying critters also use sounds to communicate socially.

And bats that use echolocation have an impressive, seven-octave vocal range to match their sound needs, the researchers said. By comparison, most mammals, including humans, have a vocal range of three to four octaves. Bats use extremely high-pitched sounds to echolocate, but employ low-pitched growls to communicate with each other."