Designed to test, among other things, the output and continuity of audio equipment, anechoic, or echo-free chambers, completely absorb the reflections of sound while being insulated from exterior noise.
To achieve this, every wall, even the floor and ceiling, are padded with three-foot-thick acoustic wedges. The surface you stand on is wire mesh, suspending you in the space with the treated “floor” below you. The room is actually one room inside another — this prevents any sound or vibration from entering the space. As the doors of these two “separate” rooms close behind you, you’re encased in a chamber that is more deafening than silent, as you begin to hear your own heartbeat.
When Guinness did their testing, they rated this room at -13 dBA (decibels A-weighted). That’s 8 times quieter than most anechoic chambers, making it one of, if not the best for doing accurate product testing. That includes assessment in sound quality, sound dispersion, distortion and frequency response. With this information, audio brands like Sennheiser, Yamaha and many others have been able to design and create products that have greater precision, clarity and accuracy.