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July 16, 2010

Hello?! Hel..o..

devadutta @ 11:59 pm, GMT +0000 ( 1279324757 ) Play

What 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

Cracked By: Logik , Rogi , dhruv.sharma , Bharath , Vinay Hegde , Raghuvansh , Advaith , Aparna , byslexia , Sumanth Patlolla , Manish Achuth , Ananth , Jean Valjean , Dibyo , Thejas V R , varuns88 , lanu , krudebox , Qbrain , udupendra , Rahulk , mankuTimma , raklodramA , Amar Peluri and dineshk

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!


26 Responses to “Hello?! Hel..o..”

  1. Logik
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    Anechoic chambers. Used for Antenna design and testing.
    Seen in the apple conference


  2. Rogi
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    Radio-frequency anechoic chamber. Like a sound-proof room, but for radio waves. Like a Faraday cage on steroids. In fact they are usually built inside of a Faraday cage. I’d guess the iPhone 4 SNAFU is what ou were referencing.


  3. dhruv.sharma

    Anechoic chambers. basically they are sound proof to such an extent that a human would have a feeling that the room is devoid of any sound at all

    recent fad: apple claims to have tested the latest iPhone in these chambers


  4. Bharath
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    Anechoic chamber –Sound/EM waves Proof rooms


  5. Vinay Hegde

    There are called Anechoic 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.’.


  6. Raghuvansh
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    Anechoic chambers; in the news because of the iPhone 4 tests done by Consumer reports.


  7. Advaith

    Apple antenna design and test labs


  8. Aparna
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    Apple’s ‘black lab’ wireless testing facilities


  9. byslexia

    These are antenna test chambers.


  10. Sumanth Patlolla
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    Radio-frequency anechoic chambers.
    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.”


  11. Manish Achuth
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    RF Anechoic chamber. They stop reflections of sound or electro magnetic waves.


  12. Ananth
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    Cellphone testing facilities. Caught media attention due to the recent iPhone signal strength fiasco.


  13. Apple tested their iPhone 4’s performance in something like this which is now causing a lot of controversy. Keeps out all extraneous signals.


  14. Dibyo
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    RF anechoic chamber – i guess the iphone 4 antenna has dragged this stuff up?


  15. Anechoic chamber. Sound neither enters the chamber nor is reflected off its walls.


  16. varuns88
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    Anechoic chambers.


  17. lanu
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    They are Radio frequency (RF) anechoic chambers used to house the equipment for performing measurements of antenna radiation patterns, electromagnetic compatibility (EMC) and radar cross section measurements.


  18. krudebox
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    Anechoic chamber, designed to stop reflections of either sound or electromagnetic waves.


  19. Qbrain
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    The facility shown is a “radio frequency (RF) anechoic chamber” (with pyramidal RAM)
    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)”


  20. udupendra
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    RF Anechoic Chambers


  21. Rahulk
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    Anechoic chamber


  22. mankuTimma
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    Radio-frequency anechoic chambers. Sound proof rooms actually.


  23. Anechoic chamber


  24. 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.


  25. Amar Peluri

    The cell testing lab – apple / iphone 4/ antenna gate


  26. dineshk
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    Anechoic chamber – rooms insulated against external radio interference and internal radio reflections.


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