Reference · Secure facilities & shielding
Anechoic chamber
Anechoic (reflection-free) chamber
An anechoic chamber is a room lined with absorptive material to eliminate reflections of sound or electromagnetic waves, creating a reflection-free space for precise testing. RF/EMC anechoic chambers combine that absorptive lining with an outer shielded (Faraday) enclosure.
What it is
A test space engineered so that waves striking the walls are absorbed rather than reflected. For electromagnetic testing, the chamber is both shielded (to keep outside signals out) and lined with RF absorber (to prevent internal reflections that would corrupt measurements).
Why it exists
Accurate antenna, emissions, and immunity measurements require a controlled environment free of both external interference and internal echoes.
Who it applies to
Contractors building EMC/RF test facilities and labs. (Anechoic/EMC is a shielding-adjacent scope Longlead tracks on its watchlist.)
Frequently asked
What is an anechoic chamber used for?
An anechoic chamber is used for precise testing that must be free of reflections and outside interference — such as antenna characterization and electromagnetic compatibility (EMC) measurements. RF anechoic chambers pair an absorptive lining with a shielded outer enclosure.
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