Musique Concrète (concrete music) is a music genre that developed from the technology of radio broadcasting. The inventor of Musique Concrète, the Frenchman Pierre Schaeffer (1910–1995), realized the significance of hearing sounds over the radio where any visual reference to a source is removed. This is known as the acousmatic situation. Standard radio dramas contain dialogue, sound effects and music that support the unfolding of the narrative; these are usually sounds that are recognized by listeners without difficulty.