VIDEO clips from around the world, including Australia, have captured an evil sounding ‘trumpet’ noise coming from the sky — but no one can explain exactly what it is.

A number of people have filmed the bizarre sound over the past 10 years with the latest coming from Germany.

In the clip, shot last month, a young child can be seen frozen with fear after the strange sound boomed from the sky.

Canadian woman Kimberly Wookey has captured a number of these unexplained events, stating on YoutTube: “This is the second time I personally have heard these sounds here in Terrace BC Canada. First time was June 19th 2013 at approx. 9-9:30am but it was not quite as intense.

“On the morning of August 29th 2013 at approx. 7:30am I was awoken by these sounds. I shot out of bed realising it was the same sounds I had heard before.”

This is her terrifying video.

UK’s Metro reported that according to NASA, it could be the Earth’s “background noise”.

A spokesperson from the agency said: “If humans had radio antennas instead of ears, we would hear a remarkable symphony of strange noises coming from our own planet.”

Scientists call them “tweeks,” “whistlers” and “sferics.”

“They sound like background music from a flamboyant science fiction film, but this is not science fiction.

“Earth’s natural radio emissions are real and, although we’re mostly unaware of them, they are around us all the time.”