Every time I travel in an aeroplane I am left with a very high pitched pulsating noise in my left ear. My last flight (which was only one hour in the air) was over a week ago and I am still experiencing this most annoying day and night problem. I had ENT surgery (sinuses) middle of last year and it has appeared since that time. I have had my hearing tested and queried for tinnitus by same ENT Specialist. No problems apparently! so no answers. It has flared up again with this last flight. Can someone advise please as I am in the position that my work forces me to travel by air. Many thanks: