The proposed limit is around the level of standing right next to a leaf blower.
It's not the hearing damage, it's the psychological stress.
The people defending this don't seem to know what a sonic boom is like. Even if you diffuse it some, it's a ridiculous force. These are huge jets. This is going to be a new ambient disruption that makes every single day worse, filling the world with din, every day, for possibly billions of people.
This is such a downgrade to the world. While the ultra-rich Tiphares style look down on the world.