I am trying to work out the best way to communicate with people. On Tuesday I tried just having one earbud in my good ear ,and nothing in my bad ear. I’ve tried this before, it tends to crash my hearing, but this time I thought I would measure before and after.
Here was the impact it had on my hearing.

Quite a massive drop.
This drop happened over about 1 hour. The second measurement was done half an hour after the call finished.
All I was doing was talking in my good ear.
My bad ear was not being used at all.
Yet the hearing in bad ear deteriorated.
Any theories as to why this happened?