As a child I had a hearing test result with this: 12 db for the left ear, and 7 db with the right ear. does anyone know what the db means, probably dessabels? and what the variance between right and left could be? also I am wondering, I had a canker soar for the first time this summer. I think that is what it was called, kinda a rash on the inner gum when I was at a wedding. Could that have been a reaction from benadryl, or what was it, heypatitis? i am not exactly sure what that is. I have never had this and you usually are supposed to get them all the time.