I developed tinnitus during a time when I was using noise-cancelling Audio-Technica ATH-ANC7b over-ears for 5+ hours a day. I did have other things going on th

I developed tinnitus during a time when I was using noise-cancelling Audio-Technica ATH-ANC7b over-ears for 5+ hours a day. I did have other things going on though, so can't specifically say that was the cause.