not sure do i understand fully, those studies were used as discussions for noise control in building and related environment, noted several interesting things :

http://www.ibp.fhg.de/ba/simulation/index_e.html



RSM developed by HK

http://www.ust.hk/~webopa/news/2000_News/news0914.html
 

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I just saw an report about micriphone-production and have a look there this thin membrane we need is used. they use it exactly the same way we thought about to use. it's the detector of sound connected to an electro-magnetical coil wich gives the information of sound digitally out. with other words our construction is a laser micro. i think to get the membrane is the sammer problem but there is stll this laser question. could it be replaced? whatever love peace and me says tim. take care
 

post it! t allright?
 

oki --

about the laser problem, which is too expensive an option but most precise that commonly used in medical and science, but there are alternative methods to recreate a similar channel, and all easier and cheaper to design

eg.

1. ultrasonic -- it detect distance too but in larger scale, for example, 2 - 8 meters
2.magnetical & Hall effect -- this is bit trick, i still don't know much of it, hall effect would mesure the magnetical change of attached field
3.camera -- i thought instead of distance detecting, the changing pattern of membrance is captured by camera and re-filter with the curve, which will give a similar result for curving recording then feed to program to generate sound/visual ... had talk to a code friend, which is difficult to explain the whole concept, but should be possible..


btw, have u read Hermann Hesse's The Glass Bead Game?



bywnow.