A Reverberation Chamber is defined as a room with low levels of sound absorption and high levels of reflectance; a space that is 99.99% reflective of sound and completely diffuse. The lab is equipped with a suite of three reveberation chambers, which are used for sound transmission, sound power and sound absorption testing, measuring at 5 seconds (large chamber), 3.5 seconds (small chamber) and 2.5 seconds (lower chamber). What follows are the approximate nominal dimensions of the chambers and openings