Hello billie48,
I have definitely changed my diet, I do take D3 and B12 along with Magnesium.  So far no changes.  I take Ativan at night to help me fall asleep.  Otherwise I lay there in bed and unable to sleep T is so loud.  I have even downloaded masking tracks to try out and still not successful.  While trying to mediate all I hear is the T so my focus is not there.  My doctors don't seem concerned about it at all.  Mine started in January 2015 after a sudden onset of Vertigo.  Since then my T has been constant, every single day.  Along with that I have been diagnosed with Migraine headaches and perhaps some sort of Vestibular Disorder, still waiting to go for Balance and Dizziness testing as I get dizzy episodes (different than my recurring vertigo) and I become off balance as well.  I love the outdoors and have been trying to get out as much as possible (June 2015 I tore the meniscus in my right knee and it is still not resolved, so it affects how much I get around).  When it rains it pours.
Thanks for your tips!