<story><title>iPhone audio detectable with AM radio</title><url>https://twitter.com/doctorcube/status/1300953606221422594</url></story><parent_chain></parent_chain><comment><author>commonjcb</author><text>It&amp;#x27;s probably by design, iPhones support magnetic-induction hearing aids, see here:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;support.apple.com&amp;#x2F;en-us&amp;#x2F;HT202186&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;support.apple.com&amp;#x2F;en-us&amp;#x2F;HT202186&lt;/a&gt;&lt;p&gt;The are 2 standards, the old &amp;quot;telecoil&amp;quot; (direct) and the new FM loop, both operating at low frequencies...&lt;p&gt;Both work at very short ranges (inverse cube of the distance)</text></comment>
<story><title>iPhone audio detectable with AM radio</title><url>https://twitter.com/doctorcube/status/1300953606221422594</url></story><parent_chain></parent_chain><comment><author>amelius</author><text>I&amp;#x27;ve found that the iPhone display is quite easily detectable between 400nm and 700nm wavelengths.</text></comment>