CONTACT is a sound installation which took place on the floor of New York University's Interactive Telecommunications Program. It utilized eleven hand-made contact microphones placed on various objects throughout the floor and recorded the various sounds produced by the 200+ persons in the department over a 24 hour period.
The video below is a five minute sample of the 24 hour piece:
Note- the sounds are best experienced on headphones with a high dynamic range.
The video below is a better descriptor of the project, highlighting each channel and its source.
After the description there remains a long unfettered sample of the work.
This footage serves as both an explanation of the project and is but an excerpt from the 24 hour long piece.
Please see here for detailed description of how the project was made: