I've been to the CAA medical dept at Gatwick the other week. I was fine but apparently hearing loss is a huge problem among pilots. Especially rotary pilots.
The man recommended the Bose X headset highly. I would too - I have four of them myself. Even after all these years, nothing comes close for performance, and nothing comes even anywhere near for comfort.
Anybody who doesn't plan to chuck flying in for good should look after their ears and get the Bose. The cheap headsets which litter the pilot shop shelves are just cheap crap, OK for flying schools where people sit on them or (often) steal them.