If I’m working on a drone in my yard, surrounded by buildings, the noise has a direct line to a few people. If I put that drone at 200 feet, suddenly many more people are directly exposed to that noise. Imagine how loud a UPS truck would be within a 90° cone above your bedroom. Also, consider how many more people would be affected by that noise per delivery.
But to be fair, the frequencies are quite different.
But to be fair, the frequencies are quite different.