July 16, 2010
Hello?! Hel..o..
PlayWhat are these facilities called and what are they used for? Although these things have been around for a while, its at the center of media attention recently.
Close up of the walls in 1
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Answer: Anechoic chambers — used to test mobile phones and other RF devices by simulating different kinds of signal situations. In news because Apple disclosed pictures of their Anechoic test to douse some fire off its ‘Antennagate’ controversy. Needless to say, the chambers look super funky!
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Seen in the apple conference
recent fad: apple claims to have tested the latest iPhone in these chambers
Quoting wiki, ‘Anechoic chambers are commonly used in acoustics to conduct experiments in nominally “free field” conditions. All sound energy will be traveling away from the source with almost none reflected back. Common anechoic chamber experiments include measuring the transfer function of a loudspeaker or the directivity of noise radiation from industrial machinery.’.
Apple invested over $100 million to construct 17 such anechoic chambers, facilities that are “connected to sophisticated equipment that simulates cellular base stations, Wi-Fi networks, Bluetooth devices – even GPS satellites.”
Anechoic chambers are commonly used in acoustics to conduct experiments in nominally “free field” conditions. They are also insulated from exterior sources of noise. (soundproof).
The interior surfaces of the RF anechoic chamber are covered with radiation absorbent material (RAM).
The pic 2 is close up of the “Pyramidal Radio absorbent material(RAM)”
An anechoic chamber
quoting wiki:
An anechoic chamber is a room designed to stop reflections of either sound or electromagnetic waves. They are also insulated from exterior sources of noise. The combination of both aspects means they simulate a quiet open-space of infinite dimension, which is useful when exterior influences would otherwise give false results. Anechoic chambers were originally used in the context of acoustics (sound waves) to minimize the reflections of a room. Their radio frequency counterpart have also been in use for a few decades, for example to test antennas, radars, or electromagnetic interference.
Blame AutoRaja