Anechoic and echo chambers
A test chamber is judged by what it does not contribute: no reflections, no background noise, no structural path from the building around it.
Also in soundproof rooms
Anechoic and reverberation chambers are measuring instruments. An anechoic room removes reflections so a source can be measured on its own; a reverberation chamber does the opposite, diffusing sound evenly so absorption and power can be measured. Both need isolation from the building before either is meaningful.
What the build involves
- A fully isolated shell, structurally separated and carried on isolators.
- Wedge or deep-absorber lining for an anechoic room, sized for the lowest frequency of interest.
- Hard, non-parallel surfaces and diffusers for a reverberation chamber.
- Very low background noise, which usually means ventilation designed specifically for the chamber.
- Access, cable routes and mounting points planned around the measurements to be made.
We keep a recording studio and echo chamber in house, used for testing on our own projects.
Tell us what you are measuring
The frequency range, the standard you are testing to and the equipment you intend to use determine the chamber's size and cut-off. Those come first; the construction follows from them.
Tell us the room
Send dimensions and intended use. You get back an indicative acoustic treatment, a systems outline and a budget range.