I have a different octave for each ear. My tinnitus effects mid range and hasn't changed LF or HF to any degree. Do to where the loss is I can hear air leaks pretty well. In my trade I need to check air filled pipe for leaks and can point them out before a couple of the field crew hear them. I probably need to put a KHz on the ring but have had it all my life so it doesn't bother me like it does most.