I took corticoids 30mgms each 12 hours during five days when this T was here for 10 days. I have experienced the ON/OFF thing since the first day but the pattern had never been one day ON - one day OFF as it is now. Three days after having it, it just faded completely. Next day was there, then two days ON, one day OFF, etc... Irregular and never repeating the same pitch or sound. Tea pot ebullition, crickets, insanely high pitched fluted tone, hiss, electrical activity... quieter, louder, left ear, right ear, both ears, no ear... What's next? Bill Cosby's voice singing yodel? I am becoming really crazy about this and in the top of this last week one day ON-one day OFF seeming being triggered by sleep. Oh, no! In the top of this I am a musician and can't play because I am scared! Does it seems to be recovering??