I am 67 and have a progressive tinnitus. Years ago it started as a high pitched monotone. Now it has morphed into a variety of continuous sounds. I have clicks, thuds, very rarely. But today a new low frequency constant motor sound has started. It sounds as if its coming from the street below - as if a truck is idling. Johns Hopkins has diagnosed me with asymmetric hearing loss. They want me to undergo a ct scan to eliminate the possibility of an acoustic neuroma (tumor) on my auditory nerve. I have declined to do so. I don't tolerate IVs well and JH being a teaching hospital I always get the tech who is training while I writhe in agony. What's worse is have the time they are clueless as to when the needle is in fact in the vein. Also there is a non invasive test that can determine the presence of AN as well. The bad news is that if found, surgery to remove the benign tumor will cause permanent and total hearing loss in that ear.