The strange oceanic noise known as ‘bio-duck’ resembles robotic quacking!
The source of the bio-duck sounds remained a mystery for decades. Now its mystery seems to have been solved.
The bio-duck noises have been detected by sonar and recorded by submarines at various locations in the Southern Ocean for over five decades. It is characterized by regular down-sweept pulses, ranging 50-300Hz.
Baffling scientists, researchers theorized a range of possible sources for the noise, including submarines, fish, minke whales and blue whales.
In April 2014 researchers released a report that claimed to finally reveal Antarctic minke whales as the source of the bio-duck’s quacking.
Hopefully we will soon be able to determine the sources of these other unexplained and mysterious sounds recorded in the deep oceans.