<div dir="ltr"><div><div><div>Alternatively you could say the original transmission IS indeed unchanged. It is the identical signal broadcast from a big mast miles away and there is no way this system can change that.<br><br></div>What it's changing is the reflection environment from what I understand. Maybe a bit analagous to sonar or radar.<br><br></div>But maybe I understand wrongly!<br><br></div>Glyn<br><br><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On 9 March 2017 at 11:42, Alex Gray, Two Lochs Radio <span dir="ltr"><<a href="mailto:tlr@gairloch.co.uk" target="_blank">tlr@gairloch.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="#0563C1" vlink="#954F72" lang="EN-GB"><div class="m_7424283220461521464WordSection1"><p class="MsoNormal"><span style="color:#1f497d">Exactly Ian - I guess he means “…without <i>significantly</i> affecting the original transmissions…” or perhaps he’s found some new laws of physics. <u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Interesting technique though if you read the full details. Reminds me of the cunning Russian passively bugged ‘friendship’ emblem that sat in the US Embassy in Moscow for some time. Also the (apocryphal I think) tale of the farmer prosecuted for lighting his house using power tapped off the near field of the Droitwich log wave transmitter.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Alex<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> <a href="mailto:cma-l-bounces@mailman.commedia.org.uk" target="_blank">cma-l-bounces@mailman.<wbr>commedia.org.uk</a> [mailto:<a href="mailto:cma-l-bounces@mailman.commedia.org.uk" target="_blank">cma-l-bounces@mailman.<wbr>commedia.org.uk</a>] <b>On Behalf Of </b>Ian Hickling<br><b>Sent:</b> 08 March 2017 22:37<br><b>To:</b> The Community Media Association Discussion List <<a href="mailto:cma-l@mailman.commedia.org.uk" target="_blank">cma-l@mailman.commedia.org.uk</a><wbr>><br><b>Subject:</b> Re: [cma-l] Singing posters and talking shirts stealing from your FM signal...<u></u><u></u></span></p></div></div><span class=""><p class="MsoNormal"><u></u> <u></u></p><div id="m_7424283220461521464divtagdefaultwrapper"><p style="margin-bottom:12.0pt;text-align:justify;line-height:16.8pt;background:#f9f9f9"><span style="font-family:"Calibri",sans-serif;color:black">".......we developed a new way of communication where we send information by reflecting ambient FM radio signals that are already in the air, which consumes close to zero power.” The UW team has — for the first time — demonstrated how to apply a technique called “backscattering” to outdoor FM radio signals. The new system transmits messages by reflecting and encoding audio and data in these signals that are ubiquitous in urban environments, without affecting the original radio transmissions......"</span><span style="font-size:13.0pt;font-family:"Arial",sans-serif;color:black"><br></span><span style="font-family:"Calibri",sans-serif;color:black">Oh yeah? </span><span style="font-size:13.0pt;font-family:"Arial",sans-serif;color:black"><u></u><u></u></span></p><div id="m_7424283220461521464Signature"><div><p class="m_7424283220461521464ecxmsonormal" style="line-height:17.05pt;background:white"><span style="font-family:"Calibri",sans-serif;color:#222222">Ian Hickling</span><span style="font-family:"Calibri",sans-serif;color:#444444"><u></u><u></u></span></p></div><p class="m_7424283220461521464ecxmsonormal" style="line-height:17.05pt;background:white"><span style="font-family:"Calibri",sans-serif;color:#222222">Partner</span><span style="font-family:"Calibri",sans-serif;color:#444444"><br><br></span><u></u><u></u></p></div></div></span></div>
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