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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: RE: " sound in an anechoic chamber will be BAD "... have you ever been in one? posted by cawson@onetel.com on March 24, 2024 at 05:09:04:
Back in '75 I went to Bell Labs in Murray Hill NJ with the son of one of the Engineers for a tour of the whole facility and spent the entire day there.
Among the technologies we witnessed like the lasering of integrated circuits and LED's, we also spent some time in the largest Anechoic Chamber on the East Coast, maybe the world. It was in a separate building bigger than a basketball arena, and 5 stories divided in 2. We were suspended on a bouncy mesh floor where testing was being conducted. They had speakers and assorted devices they were testing in there as well. Bell Labs was legendary until the court case which they lost. Now we have AT&T and Lucent, good gosh what anti-progess
The objective of Testing like this should be obvious. No reflections from any boundaries including floors. I worked in one chamber for the military in California and it had a floor to stand on and wasn't nearly as large and more like a house room with a lot of wedges on the walls. I'm familiar with chambers.
When my friend turned around and spoke out loud, all I perceived was his voice out the back of his vibrating skull, not his throat which was not there at all. Reflections were down to infinitesimal levels. I was there, I heard it. If you listened to a stereo in it you would hear reflections only off the speaker and enclosures themselves.
I would not "call it BAD" whatsoever. I and anyone else would call it "the sound of a source with no or insignificant reflections" (as low as you can go on Earth).
The sound in it was much different from "Outside" where sound reflects off the grass and ground and whatever equipment is being used.
Time-Delay Spectrometry or variations thereof are used now because chambers like this one are now long gone
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Follow Ups
- it's not the same - Story 06:12:49 03/24/24 (2)
- And ... - cawson@onetel.com 10:22:59 03/24/24 (1)
- RE: And ...you just had to say something in response - Story 13:14:46 03/24/24 (0)
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