Decibel Outdoor is since 2002 a yearly Open-Air-Techno party in the Netherlands. Formerly decibel outdoor was based in Binnenmaas near Rotterdam. Since 2005 is decibel outdoor located in the nature park Beekse Bergen in Hilvarenbeek.
The festival plays mostly hardstyle and related genres such as Old-School-Rave, Jumpstyle, Hardcore and Hardtrance. It was founded in 2002 by b2s.
Many prominent hardstyle artists have performed there : Charly Lownoise & Mental Theo, Lady Dana, Psyko Punkz, Coone, Headhunterz, Wildstylez, Noisecontrollers, Brennan Heart, Technoboy, Paul Elstak, Buzz Fuzz, Rob Gee, Rotterdam Terror Corps, The Prophet, Blonde Redhead, Ruthless, Stunned Guys, Yves Deruyter, Warmduscher, Kai Tracid, Max B Grant, Mauro Picotto, Gizmo, Neophyte, Speedy J, Tatanka und Bountyhunter.