Is this a recording of the mysterious Windsor Hum?
A PhD student named Brian Garbet recorded audio of what he suspects is the Windsor Hum.
He made the recording under water in the Detroit River last year.
But is it the Windsor Hum? He suspects it is but wants experts to analyze it.
In the meantime, he shared it with CBC. Take a listen to the audio and judge for yourself.
You can listen to the audio here or in the player above this story.