| LC control no. | sh 85004932 |
|---|---|
| LC classification | QC668.A54 |
| Topical heading | Anechoic chambers |
| Variant(s) | Electromagnetic anechoic chambers Radio anechoic chambers |
| See also | Electronic instruments Physical instruments Rooms |
| Found in | Work cat: 2018025829: Anechoic and reverberation chambers, 2018 galley (indoor measurement facility where electromagnetic waves are absorbed by the boundaries) LC data base, viewed Oct. 9, 2018 (in titles: Electromagnetic anechoic chambers; Radio anechoic chambers) Applied science full text, Oct. 9, 2018 (subject term: Anechoic chambers (Electromagnetics)) Encyclopedia Britannica online, Oct. 18, 2018 (Anechoic chamber, sound laboratory designed so as to minimize sound reflections as well as external noise. External sound is excluded by physical isolation of the structure, by elaborate acoustical filters in the ventilating ducts, and by thick masonry walls. Interior surfaces are covered with absorptive material, such as glass fibre or mineral wool in blankets or in horizontal and vertical wedges. Ceiling and floor are similarly padded; a thin steel mesh just above the floor provides a surface for walking. Sound reflection can be reduced to one part in 1,000 in such a room, thus simulating the acoustical conditions of unobstructed free space) Microwaves 101, Encyclopedia web site, viewed Oct. 19, 2018 (An anechoic chamber is a space designed specifically to absorb sound or electromagnetic waves) |
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