I assume that when your hearing starts deteriorating the idea of hearing aids is to amplify the frequencies that has deteriorated by excessive loudness in your past.    Does hearing aids actually further hurt (deteriorate) the areas of frequency loss.  In other words, is the cure actually...

I know you can't catch sexually transmitted diseases by inserting in ear monitors but, it seems unsanitary to put someone elses iem's into your own ears.  In the past, I have shared my over the ear headphones with friends to get their impression but, is there a way to swap iem's.  I suppose that...