Sound Chambers Acoustic anechoic chambers

Research

Anechoic chambers are commonly used in acoustics to conduct experiments in nominally "free field" conditions. All sound energy will be travelling away from the source with almost none reflected back. Common anechoic chamber experiments include measuring the transfer function of a loudspeaker or the directivity of noise radiation from industrial machinery. In general, the interior of an anechoic chamber is very quiet, with typical noise levels in the 10–20 dBA range. According to Guinness World Records, 2005, Orfield Laboratory's NIST certified Eckel Industries-designed anechoic chamber is "The quietest place on earth" measured at −9.4 dBA. The human ear can typically detect sounds above 0 dB, so a human in such a chamber would perceive the surroundings as devoid of sound. I found that going into this chamber to be rather disorientating because it made me feel deaf. The chamber design felt as if we were in a speaker box that is completely composed and blocked. It was very interesting going into these chambers learning and experimenting these different