Well, all of those can potentially cause ringing in the ears. So can magnetic fields. The only way to figure it out is to have meters for measuring, and compare how you feel in different environments. Have you traveled much at all during these decades, or have you been at the same spot all the time? If you have traveled and stayed in other environments, then your EMF/EMR exposure HAS varied during this time and your symptoms should have as well if they are being primarily caused by exposure. I would really recommend traveling if you have not at all during this time.
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