if your question refers to laying down grooves on a drumkit, and you plan to play anything other than soft jazz strokes with brushes, the answer is "very badly." the percussive attack of a stick on a snare or cymbal will instantly flatten the cilia in your ear, the little hairs responsible for detecting frequencies. they will, after a few hours of quiet, stand back up; but over time, as in "a year or two", fewer and fewer will stand back up, they will die. this kind of damage initially results in high frequency loss, then short term ringing, then (if you keep drumming) tinnitus, pain, and severe hearing loss.
OR, wear foam earplugs when you play and avoid this damage altogether. better still, you can go to an audiologist (find one in the yellow pages) and have them make custom molds for your ears which they then send to a lab to make you "musician earplugs" (http://www.etymotic.com/ephp/erme.aspx) that fit your ear perfectly, and have special filters that let all the sound thru, just at a quieter level. that way, things don't sound muffled and distant they way they do with foam plugs... they just sound quieter.
the custom plugs cost about $150 total, and are the single best investment you can make for your hearing. i started wearing them when i began drumming at the age of 16. 20 years later, my hearing tests are better than most guys 10 years younger than i. i wear them at clubs, concerts, even on the insanely loud streets of manhattan.
good on you for being concerned about your hearing. as a lover of music, nothing is more precious to me... you can take my eyes, just LEAVE MY EARS ALONE!