The sperm whale (Physeter macrocephalus)

Sperm whales produce a variety of clicking sounds. During foraging dives they use clicks to localize prey by emitting regular clicks and so-called creaks (short series of clicks with fast repetition rate, close to prey encounter). In social context they produce codas which are repeated patterns of clicks. Different groups of sperm whales use different codas (dialects) and within a group codas can vary slightly by individuals. At PALAOA we recorded regular click trains. In the snippet you hear several overlapping regular click trains (which are barely visible in the spectrogram) as well as some faint Weddell seal calls in the background.

Recording credit: CC-BY 4.0 Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research 2022.

Part of the Polar Sounds project, a collaboration between Cities and Memory, the Helmholtz Institute for Functional Marine Biodiversity (HIFMB) and the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI). Explore the project in full at http://citiesandmemory.com/polar-sounds.