On August 29, 2013 I had a ringside seat to one of those strange sounds. The place was near the west end of River Drive in Thornhill. On both sides of my property were quite large and high buildings.
It was around 8 a.m. and I was midway from the front and middle of these buildings.
While I was facing east this sound came from the side wall of the building that was only 50 feet away.
It wasn’t from one spot but covered an area about 20 feet long and 12 feet high.
The sound was not uncomfortably loud and some seemed to come from the front of the building. This area was immediately checked and no vehicles could be seen along River Drive. The staff to this building had not arrived yet.
Next I walked across the vacant land that lay between River Drive and the highway and could not see any vehicles or anything that would have made this noise. Also, I could not find anyone else who heard it.
This sound could hardly have been deflected from somewhere else. These buildings are only 100 feet apart and open up to a car dealership across the highway.
The sound was clearly coming from the wall of this building only 50 feet away.
At that time I did not make an issue out of it, just let it ride. Since these sounds are reappearing it is another matter.
What could be causing these sounds? For my part I would put them in the category of crop circles and cattle mutilating. For anyone who scoffs at this, let them come up with a better explanation.