From my book:
Some musical composers apply electronically produced music with natural sounds from the environment to provide the audience with a real association, such as wildlife, bodies of water, seasonal sound sources, and weather phenomena. This particular form of musical presentation, known as ambient music, for its affect on the ambience of one’s surroundings, is often recorded for health facilities.
An example of such musical composition is the healing music of composer, Brian Eno, and his 1978 release, Ambient I: Music for Airports. In the liner of this album, Eno writes, “My intention is to produce original pieces ostensibly (but not exclusively) for particular times and situations with a view to building up a small but versatile catalogue of environmental music suited to a wide variety of moods and atmospheres.”  This form of incorporating musical sounds with nature provides the added aesthetic of stimulating the senses with a portion of reality to which the audience relates through memory, transporting an individual to an aspect of memory, aligning the audience with the composer’s perception of reality.
In his musical composition, Earth, An Ending, he provides the audience with a reality that heightens awareness of the possibility of positive cultural change either within an individual or within Earth’s community as a whole.