I haven't used the product, but a glance at the product info indicates to me that it has limited efficacy. For example, the AD232 product claims to "reflect and refract radio waves, preventing wave transmissions by as much as 90%." Now that's a scientifically unclear claim, but I take that to mean the product will attenuate RF over some frequency range by up to 10dB. The graphs for other products seem to indicate a 15dB attenuation, but I may be reading them incorrectly because they are so small. The products may work on the principal of a Faraday cage, but it clearly wont turn the room on which it is used into a Faraday cage. Even if the product provided 100% attenuation, it would only work on the surfaces to which it is applied. In most cases, windows, door, floors, & ceilings would be unchanged. I can see a value in these products, but careful planning may be required for its effective use.
Chuck Enfield Sr. Communications Engineer PSU, Information Technology Services Suite 110, University Support Bldg. 2 University Park, PA 16802 ph. (814) 863-8715 fx. (814) 865-3988 -----Original Message----- From: Divya Ravindranath Kurup [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 14, 2006 8:24 PM To: [email protected] Subject: Re: [WIRELESS-LAN] Paint that attenuates Radio Signals After reading this i checked out a company that manufactures this paint additive- http://www.forcefieldwireless.com/products.html -divya Divya Kurup Graduate Student, School of Information Studies Syracuse University Quoting Randy Grimshaw <[EMAIL PROTECTED]>: > I would also ask about the long term environmental impact. Is the > material used (i.e. lead) non-toxic? or will it someday chip, leach, > fume or whatever. > <><Randy > > > <><Randall Grimshaw > Room 203 Machinery Hall > Syracuse University > Syracuse, NY 13244 > 315-443-5779 > [EMAIL PROTECTED] >>>> [EMAIL PROTECTED] 02/09/06 4:28 PM >>> > While I haven't tried that particular product, I have use other types > of paint to attenuate RF (don't recall the commercial names). They > worked fairly well, but since they blocked a pretty wide range of > frequencies you might have unintended consequences. For example, cell > phones signals were also attenuated. > > David > > > > > On Feb 9, 2006, at 1:17 PM, Stephen Holland wrote: > >> Has anybody heard of a product from Force Field Wireless that can be >> painted on walls to attenuate Radio Signals like WiFI?. >> >> I happened to find a link to it by accident and I'm curious as to how >> effective it is. >> >> Thanks >> >> Steve Holland >> Network Engineer >> Northeastern University >> >> ********** >> Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at http:// >> www.educause.edu/groups/. > > ********** > Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > ********** > Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
