George Lukacs eat your heart out! In cavernous factory halls, with scarcely a human being present, unmanned machines produce computer components or electrical cable as thick as your arm, to the accompaniment of a cacophony of sound rich in overtones and variation. In our gentle stroll through the machine halls of Siemens AG, we explained to the dozen or so workers “We’re just measuring the atmospheric noise!” Hence the title with no manipulation. These recordings were made in the summer of 1999.