Jorabi wrote:
I own a 2-family house ... I live upstairs and rent out the
downstairs. I removed all the carpeting on my floor due to
allergies. My entire flat has hardwood floors that need
refinishing badly.

The problem is that noise travels too easily between floors.
Besides my footsteps and my/their entertainment/talking/sex
noises, my floor also squeaks and clicks a lot.

Reinstall the carpeting.

Go to the doctor and get shots for your allergies.