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http://en.wikipedia.org/wiki/Ambient...c_for_Airports
quiet, unobtrusive music
intent of diffusing the tense, anxious atmosphere of an airport terminal. To achieve this, Eno sought to create music "as ignorable as it is interesting."[11] Rather than brightening the atmosphere as typical background music does, Music for Airports is "intended to induce calm and a space to think."[11] Eno conceived this idea while spending several hours waiting at Cologne Bonn Airport in Germany in the mid-1970s and being annoyed by the uninspired sound atmosphere.[12]