This sketch was made as part of a series of ambient pieces designed to let environmental sounds through silences and spaces in the composition. It's influenced by John Cage and ideas in Zen philosophy, although rather than inviting the listener to perceive natural sounds as 'musical' in and of themselves (4'33), situates environmental sounds in the frame of a tonal composition, allowing them to be experienced through the part of awareness already attuned to music.
The point of this is to change the context through which environmental sounds are perceived. When listened to in a city for example, sirens become musical textures rather than signals of crisis, heavy machinery becomes rhythmic texture over intrusive noise and background traffic becomes a drone etc. This detachment from psychological reactions associated with sounds is meant to aid in 'awareness', 'mindfulness', 'being present', or whatever you want to call it.