When I received my SMR's from ST Louis , I found in the exit physical that the Dr stated in his notes that I had "bilateral hi frequency hearing loss". I also have constant tinnitus in both ears. The VA service connected the hearing loss at 0% and the tinnitus at 10%. They agreed that my hearing problems were caused by exposure to the noise of the Huey engines and rotor blades. Hearing protection wasn't considered too important in my part of Nam.