 The concept was used by eco-activists in the early 1990s, utilizing headphones at outdoor parties to minimize noise pollution and disturbance to the local wildlife.In 1994, the Glastonbury Festival linked its on-site radio station to the video screen sited next to the Main Stage, allowing festival goers to watch late night World Cup football and music videos on the giant screen after the sound curfew by using their own portable radios.The idea was the brainchild of the project manager from Proquip, who supplied the giant screen, and engineers from Moles Recording Studio in Bath, Somerset, who were working with Radio Avalon.