<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>balls187</author><text>Most of my office windows at Boeing had little ultrasonic buzzers on them to prevent such an attack.&lt;p&gt;On my offices was actually in a large farad cage to reduce&amp;#x2F;eliminate EMF leaks from workstations.</text><parent_chain><item><author>ravenstine</author><text>One way you can do this without another light source is to bounce a laser beam off a window or other things that are reflective.&lt;p&gt;In fact, the same principle can be achieved with radio.  The Russians once planted a device in a wooden seal they gave to a US ambassador as a gift which, when a focused radio beam was aimed at it, would reflect and oscillate that beam due to vibrations in the air.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Thing_%28listening_device%29&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Thing_%28listening_device%...&lt;/a&gt;</text></item></parent_chain></comment><story><title>Spies can eavesdrop by watching a light bulb&apos;s vibrations</title><url>https://www.wired.com/story/lamphone-light-bulb-vibration-spying/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>perch56</author><text>Leon Theremin was a genius that also created one of the first electronic instruments carrying his name now.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Theremin&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Theremin&lt;/a&gt;</text><parent_chain><item><author>ravenstine</author><text>One way you can do this without another light source is to bounce a laser beam off a window or other things that are reflective.&lt;p&gt;In fact, the same principle can be achieved with radio.  The Russians once planted a device in a wooden seal they gave to a US ambassador as a gift which, when a focused radio beam was aimed at it, would reflect and oscillate that beam due to vibrations in the air.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Thing_%28listening_device%29&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;The_Thing_%28listening_device%...&lt;/a&gt;</text></item></parent_chain></comment><story><title>Spies can eavesdrop by watching a light bulb&apos;s vibrations</title><url>https://www.wired.com/story/lamphone-light-bulb-vibration-spying/</url></story>