https://www.tvtechnology.com/news/riedel-intercom-technology-used-in-major-stadiums
Riedel intercom technology used in major stadiums | TV Tech
Jul 27, 2007 - The digital intercom systems were used in the United States and the UK during the recent Live Earth concerts.
technology usedmajor stadiumsriedelintercomtv
https://www.governor.ny.gov/news/governor-cuomo-announces-sports-and-entertainment-events-major-stadiums-and-arenas-can-reopen
Governor Cuomo Announces Sports and Entertainment Events in Major Stadiums and Arenas Can Reopen...
Governor Cuomo announced that, building off of the successful Buffalo Bills pilot program, sports and entertainment events in major stadiums and arenas with a...
sports and entertainmentmajor stadiumsgovernorannouncesevents