What IS this strange sound from the sky? Noise heard across the globe for nearly a DECADE .

A mysterious noise from the sky is continuing to baffle people all over the world - as well as giving those who hear it sleepless nights.

Sounding like a trumpet or a collective from a brass section of an orchestra, a selection of videos shot from the Canada to Ukraine, via the U.S., Germany and Belarus show strange goings on above us.

And the eerie sounds have been continuously heard at all different times and locations for almost a decade. 

See if you can work it out ?