In the last three decades there has been an increasing emphasis on the importance of the use of fidelity assessment on improving the science of psychological, social, and behavioral research.
A cleanroom is an area or enclosure in which the air has to be cleaned to a defined particle limit, usually in particles per cubic foot. In the United States most cleanrooms are discussed in terms of Classification Limits.
Headroom, properly, means how much more clean volume you have until clipping sets in. An efficient speaker will increase the amp's headroom by allowing the amp to be louder at a particular wattage output. A lot of people incorrectly use it to refer to the point on the volume knob where the amp breaks up. - Scott.