[bahy-oh-uh-koo-stiks or, especially Brit., -uh-kou-] 
) | the science of sounds produced by or affecting living organisms, as for communication or echolocation. |
bioacoustics bi·o·a·cous·tics (bī'ō-ə-k&oomacr;'stĭks)
n.
The study of sounds produced by or affecting living organisms, especially those sounds involved in communication.