Biting down hard on food using my whole mouth, I hear a HORRIBLY loud ring in my left ear. Biting down using the RIGHT side of my mouth ONLY, I hear NO RINGING AT ALL. 0%. Biting down using the LEFT side of my mouth ONLY, which has a lot of wear on the teeth compared to the right, I hear a HORRIBLY loud ring in my LEFT ear. 300% normal tinnitus volume. Could it be TMJD? I've never been evaluated.