This particular datacenter was retrofitted into an existing industrial building, there was some sort of industrial metalworking factory there previously. Structure dates to 1972.

The houses are basically right across the street from it. The noise does sound annoying as hell. This seems like a basic failure in local permitting/zoning to allow something this noisy without a significant empty buffer zone to any residences.

edit: it's here: https://www.google.com/maps/place/Dowagiac,+MI+49047,+USA/@4...

Also, noise regulations aren't good for this kind of constant tonal sound. Any facility like this should have to prove it can operate within a certain acousting footprint before it's built