Meh, I suffer from a load of different ear related issues and I am partially deaf in one ear. I also work in IT infrastructure, and constantly have 2+ servers whining at me on my office's build bench, I don't think that me bringing a mech keyboard to work has had any adverse effects on me.
Stop being a hypochondriac, and get a mech keyboard if you want one, I highly doubt it will make you deaf or give you any other hearing related issues... The only thing which will have an adverse effect on is your bank balance, as you'll want to replace every single keyboard that you touch with a different mechanical one.