View Full Version : Anechoic Chamber ( for Stagger )
Stagger:. .Is it correct to presume that if two people sat opposite each other across a dining room table in an anechoic chamber (sound reflection reduced to one part in 1,000) and shouted at each other then neither could hear the other? Also I'm not sure what can be learned from building an anechoic chamber. Appreciate a little help on this one.. .Regards,
KIFIS
Dry Martini
8th Feb 2002, 12:45
An Anechoic chamber does not have any magical properties; it simply has walls coated with non reflective sound absorbing material, typically of a roughly egg-box surface structure.. .The direct "line of sight" sound would still travel along the table to the other person as normal, and be heard as normal. Simply all echoes off the walls would be absent.. .Communicating in a chamber with Activenoise reduction operating however is a whole different matter.
Don D Cake
8th Feb 2002, 14:12
Just to add to Herr Martini's comments....you would use an anechoic chamber when you wanted to accurately measure/evaluate the accoustic properties of a device, for example, the frequency response of a loud speaker. In a normal environment, sound reflections from the walls, floor and ceiling would give gross errors.
You should try listening to music in an anechoic chamber, it's weird.
stagger
8th Feb 2002, 16:02
KIFIS,
Well, I'm flattered that you think I might know the answer to this one but I'm afraid I don't. Not really my area at all, sorry!
Can't help with acoustics but if you've got any questions about neuropsychology, neuroanatomy, reproductive physiology, risk-sensitive decision making, or the sexual behaviour of rodents I might be able to help!
Stagger
Kifis. .What are you planning?. .Are you thinking of covering your dining room so you can't hear the wife? :) :) . .I'm afraid you will still hear her. <img src="mad.gif" border="0">
KIFIS
10th Feb 2002, 07:50
Dry Martini and Don D Cake:. .Thanks for the input. I now have a better understanding of how it all works.
Stagger:. .We mortals must have someone to look up to !!
Sky 9:. .Don't think I'll bother to build an anechoic chamber. Just interested to know something about . .the mechanism.
KIFIS
Mark 1
15th Feb 2002, 17:50
KIFIS,
I've been in the large anechoic chamber at Pyestock (Farnborough) where they tested scale components from aero-engines (fans, nozzles etc).
It is a very eerie sensation. Its difficult to hear someone with your back to them, and there is none of the reverberation that makes most noises sound 'normal'.
Mark