Examples
“The Charlotte’s “dead room”—designed after a similar structure at Bell Laboratories—was what was formally known as an anechoic chamber.”
“The so-called anechoic chamber, which measures nearly 36-feet long, is made of special material that absorbs electromagnetic waves.”
The Wall Street Journal: Stress Testing Metal Detectors and Other Devices
“Apple's website, the labs consist of 17 antenna characterisation, or "anechoic", chambers that are used to measure overall antenna performance.”
“It's an amazing, slightly dizzying experience, and one that works on the mind in somewhat the same way as the anechoic chamber works with sound -- or the absence thereof.”
“Stephen Voss for The Wall Street Journal Dr. Bassen inside the FDA's anechoic chamber, used to study if electronics interfere with medical devices.”
The Wall Street Journal: Stress Testing Metal Detectors and Other Devices
“Forty years after entering an anechoic chamber for the first time, I still remember my strange feelings of pressure, discomfort, and disorientation," said Barry Blesser, co-author of the book Spaces Speak, Are You Listening?”
The Guardian: The disquieting sound of The Great White Silence
“The Democratic Party exists in an anechoic chamber when compared to that.”
John Terry’s sacking as England captain tells us something interesting...
“You'll even get a glimpse of Elias testing audio in our anechoic chamber!”
“I also remember being in the anechoic chamber at Lincoln Lab getting a demo in adaptive noise suppression algorithm use, which cleaned something up with a really horrendous signal to noise ratio....”
“The University College London placed a tray of jello in the shape of St Paul's cathedral in an anechoic chamber and recorded the sound it made when it wobbled.”
Lists
These user-created lists contain the word ‘anechoic’.
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Logolepsy
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
Anschauung, Areopagus, Argus, Briarean, Dei gratia, Dei judicium, Deo volente, Duecento, Foehn, Geflugelte Worte, Gegenschein, Hakenkreuz and 9230 more...
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Audio Argot
Inspired by the Audio Cyclopedia, by Howard M. Tremaine
scoring stage, anechoic, selsyn-interlock ..., lavalier, duller, mutual conductance, negative feedback, tangent error, Barkhausen noise, blimp, flutter meter, tweeter and 16 more...

jmjarmstrong JM gives a shout out to the Anechoic Club. Oct 26, 2010
john “2.84 Describe the construction of an anechoic chamber.—Anechoic chambers are enclosures that are echo-free, withing a specified frequency range.”
Audio Cyclopedia by Howard M. Tremaine, Howard W. Sams & Co., 1969, pg. 66 Feb 4, 2010