- Canadian army investigates 'pinging' noise that scares away animals in depths of the Arctic sea | A remote hunting community in Nunavut, on the edges of the Arctic Circle, were baffled by a sound also described as a “hum” and a “pinging” throughout the summer. http://www.independent.co.uk/news/world/americas/army-investigates-canada-pinging-noise-animals-arctic-sea-a7398091.html 5 comments worldnews