The use of physical space

Upon research I found a sound installation which I found particularly interesting. It is called "infanite mass" by Gwen Stevenson and is a work which explores the nature of human experience. The creator states that people live in both a physical and metaphysical world and these are experienced very differently. It contains 7 suspended spheres which are placed at different heights in the room and each have speakers hidden in them, which allows for each one to be a separate sound source. All of the spheres are connected by audio cables and are coated in polystyrene which resembles stone and the participant has space to walk between these spheres and experience the movement of sound between them. In the creation of sound, the dopplar effect is used which effectively makes the movement of sound more apparant as the frequency of the sound wave to the participant increases and decreases depending on their position in the room. Also panning is used which allows for exact focusing of sound in the space.
There are five sources of sound used. One is computer generated sound from the low to the high end of the frequency spectrum and the other four are white noise. White noise covers all of the frequency spectrum which suggests the creator could have been relating to many aspects of the human experience. The title of the work is "Infanite mass" and the creator is highly successful in conveying this. The Spheres convey the physical domain that humans live in as these can be seen and touched. The sounds that move between the spheres represent the metaphysical domain and so these are not tangible and therefore very different. These two aspects suggest infanite. Also, the space in which the work is set in works well. It is very minimal and so adds to the effect of experiencing just the spheres and the sound moving between them.
http://www.youtube.com/watch?v=tW-aOlb2Xjw