I dont know who did the RIAT this year but it was frustrating. Several times the departing aircraft was not announced and whose bright idea was it to put the speakers on the crowdline - I lost count of how many pictures have pole or speaker in them. Could they not follow Farnborough's example and put the PA system behind the crowd - giving unobstructed views. Perhaps a 'quiet zone' with no speakers for those who would rather not listen could be considered.