I too have a constant ringing in my ears. I can hear it right now as we speak. It has always been there. It doesn't bother me and I have learned to ignore it. Most of the time I don't even notice it until it is mentioned or it becomes very quiet. As soon as I inhale the first puff of DMT vapor, the ringing consumes all until it goes away and turns into a hovering sound for the remainder of the experience. Last night that hovering sound lasted until I feel asleep, well after my dose of DMT.