Brian Eno, 1978. The album that named ambient music. Originally installed at LaGuardia.
From Wikipedia
Ambient 1: Music for Airports is a studio album by the English musician Brian Eno. It was released in February 1979 through E.G. Records and Polydor Records. It was the first Eno album released under the label of ambient music, a genre intended to "induce calm and a space to think" while remaining "as ignorable as it is interesting". While not Eno's earliest entry in the style, it is credited with coining the term.