State-of-the-art soundproof and electromagnetic radiation proof chambers for ultra-low noise sensing. The acoustic facility includes a large (5m x 5m x 2m) anechoic shielded chamber providing an extremely low-noise environment suitable for all low frequency acoustic, optical and mechanical device/sensor characterisation. The RF facility includes a large (4m x 3m x 2m) anechoic shielded chamber suitable for a wide range of low noise measurements with significantly attenuated electromagnetic levels. This has been calibrated for uninterrupted use between 10MHz and 34GHz.
The key characteristic of an anechoic chamber is that it’s designed to absorb reflections of waves within the chamber rather than have them bounce off the walls which would cause an echo. These chambers, if designed and assembled correctly, also do a great job at keeping waves from entering the chamber i.e. they provide shielding from outside interference.
Electronics engineers use anechoic chambers for electromagnetic compatibility (EMC) or electromagnetic interference (EMI) and RF testing. The interior walls of these chambers are treated with special material to absorb electromagnetic waves. There are also audio anechoic chambers, designed for applications such as audio recording, that absorb sound waves rather than electromagnetic energy.
There are three main types of acoustic test chambers:
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