How does the spring sounds under the Arctic seas?

Surprisingly loud and cacophonous believe it or not!  Although completely covered with ice on the surface with no signs of life these waters are filled with various animals.  Acoustic communication is key in a dark, ice-covered environment.  With the help of the hydrophone scientists are monitoring the sounds made by various aquatic life forms in […]
Surprisingly loud and cacophonous believe it or not!  Although completely covered with ice on the surface with no signs of life these waters are filled with various animals.  Acoustic communication is key in a dark, ice-covered environment.  With the help of the hydrophone scientists are monitoring the sounds made by various aquatic life forms in the Arctic. A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change.     So, what do they hear?
  • Trills of the bearded seals
  • Moans and grunts of the bowhead whales
  • Whistles of the beluga whales
  The reason for all this cacophony is that sounds propagates well in water and covers longer distances. There is a lot of shipping noise in this area of the ocean, which causes some animals to gradually change the frequency of their calls.  They start calling at higher frequencies, to escape the shipping noise. Read more here.    
Sign Up For ATI Courses eNewsletter