this has been solved, from my understanding - it's a combination of the industry on the island with the salt mines under windsor. what's happening is that the vibrations are sending sound waves through the old mines, which is literally shaking the whole ground.

i'm on the other side of oullette, and i've never heard anything over here. but if i was living around lasalle, i might be more concerned about sink holes swallowing my house....

www.cbc.ca/news/canada/windsor/windsor-hum-discussion-goes-to-washington-1.3645376