It appears the mystery has been solved...at least in this area. The video I posted the first time showed that the occurances are very irritating to West Windsor and LaSalle (where I reside) residents. Well there is this island on the American side called, "Zug Island" in where some steel companies operate on. Though there were noises years ago coming from Zug Island they were never as loud as this. Well Zug Island is located between Windsor and LaSalle (on the American side) which explains why it is usually the residents in those areas that are most affected by it. As a matter of fact? My son texted me last night and told me that he had heard those noises that we were discussing yesterday as a result of these videos. So. Here is a google map showing "Zug Island" (you may have to zoom out about 3-4 times to see the relation between Windsor/LaSalle/Detroit). Also here are a couple of news articles on it.