I am 51 years old, and I've had tinnitus, and equilibrium issues, ever since I can remember. I became fairly acclimated to the continual, high pitched/hiss. I was only aware of it at certain times. Generally, I only heard it when it was really quiet. In the last few years, I've had periods of screaming tinnitus. This usually lasted for a few days. But, in the last few weeks, I have been experiencing an additional, and continual, alternating high- low tone. I'm guessing that since its new, I'm aware of it at all times, except for sleep. I'm getting really frustrated.