My wife’s family was like that when I met them. Stomping around, chewing loudly, and TV super loud. When we moved in together, we got our hearing checked and it turned out she had a genetic issue that fused her stapen (hammer bone in the ear) into a fixed position which meant severe hearing impairment. Luckily a surgeon can replace the stapen with a titanium micro prosthesis that solves the problem.

Just after the procedure she called me downstairs because she said she was hearing weird noises and it turned out to be the refrigerator compressor she had never heard before. After both ears were completed, a lot of the loud behavior stopped.

I really think that some subset of these people just have hearing loss.