"Doctor, I don't know what it is, but lately I have been passing gas like crazy... but at least they're silent and don't stink."
"Hmmmmm, I want you to take this three times a day, and we'll see you in a week."
The next week, she's back, and she tells the doctor "Well, I'm still passing gas, however, now they're really loud, but at least they don't stink."
and the doctor smiled and said "yes, it looks like we fixed your hearing, now let's work on your loss of smell."