I'm curious if users of these shielding pockets will discover the law of unintended consequences. If a cell phone is placed in the pocket, it will have trouble picking up the signal from any cell towers. The phone will boost its transmit power and my try linking to the towers more frequently. I find that my phone's battery is drained much faster in areas with fringe reception. Users of this shielded pocket may find that their battery is dead when they retrieve their phone.
Of course, this just bring up the question of why people don't turn off their phone if they are worried about snooping. Even if you use the pocket, your phone has to be pulled out and exposed to be used. On a related note, this article may have been posted before but it has some relation to the subject at hand. http://www.theatlantic.com/health/archive/2012/09/tin-foil-hats-actually-make-it-easier-for-the-government-to-track-your-thoughts/262998/ Full details with the test setup and results can be found at the following link. http://web.archive.org/web/20100708230258/http://people.csail.mit.edu/rahimi/helmet/<http://web.archive.org/web/20100708230258/http:/people.csail.mit.edu/rahimi/helmet/> Ted Eckert Compliance Engineer Microsoft Corporation [email protected]<mailto:[email protected]> The opinions expressed are my own and do not necessarily reflect those of my employer. -----Original Message----- From: John Woodgate [mailto:[email protected]] Sent: Friday, September 5, 2014 7:28 AM To: [email protected] Subject: Re: [PSES] RF shielding in clothing. In message <[email protected]<mailto:[email protected]>>, dated Fri, 5 Sep 2014, Doug Powell <[email protected]<mailto:[email protected]>> writes: >Ah yes, > >But can coax cable with a double layer shield claim that much >attenuation at all frequencies? I doubt that braided shields made of such fine filaments would be mechanically strong enough. Semi-rigid coax does pretty well, I believe, with one solid shield. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk<http://www.jmwa.demon.co.uk> Quid faciamus nisi sit? John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher: <[email protected]<mailto:[email protected]>> David Heald: <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
