<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html lang="de" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title></title><style type="text/css">html,body{background-color:#fff;color:#333;line-height:1.4;font-family:sans-serif,Arial,Verdana,Trebuchet MS;}</style></head><body><p>Maybe not a 100 percent the topic, but there are two things "coming into my mind" by reading your posting:<br><br>1. <span class="Y2IQFc" lang="en">overtone singing (Obertongesang)<br><br>Basically it singing [or speaking] with a hidden melody [or hidden words] inside.<br><br><a href="https://de.wikipedia.org/wiki/Obertongesang" target="_blank" rel="nofollow noopener">https://de.wikipedia.org/wiki/Obertongesang</a><br><br>2. Hypersonic Sound (HSS)<br><br>This is a war technique by projecting sound on the skull of a soldier - not recognizable by other soldiers - producing voices in his brain (to quit fighting). It should also used for commercials, f.E. projecting the sound of the opening of a soda can on the skull of a passerby.<br><br><a href="https://en.wikipedia.org/wiki/Sound_from_ultrasound" target="_blank" rel="nofollow noopener">https://en.wikipedia.org/wiki/Sound_from_ultrasound</a> <br><br>Yes, technology and the tricks of law enforcement are crass sometimes. <br><br>My favourite - and it is used by law enforcement a long time - is watching through walls without a search warrant: Through range-R technology, with something like the Camero Xaver LR80.<br><br><a href="https://youtu.be/ZfvmdX631Gc?si=zsB7YM9Dt-vnjcMw" target="_blank" rel="nofollow noopener">https://youtu.be/ZfvmdX631Gc?si=zsB7YM9Dt-vnjcMw</a> <br><br>Have a nice day!<br><br>Roland Ionas Bialke<br><br></span></p>
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<p>Henry Baker schrieb am 16.08.2025 23:34 (GMT +02:00):</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">*** spoiler alert ***</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">In the 2025 British series "Code of Silence", a key plot point is where the main character's hearing aids are hacked so that they become listening devices.</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;"><a target="_blank" rel="nofollow" data-noscript-removed-href="https://en.wikipedia.org/wiki/Code_of_Silence_(TV_series)">https://en.wikipedia.org/wiki/Code_of_Silence_(TV_series)</a></p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">Having looked into some of the issues surrounding modern Bluetooth and hearing aids, I have concluded that this hack is not only not far-fetched, but is a very real security issue.</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">However, I'm currently at a loss for suggestions about what to do, because it's difficult enough to get decent SW/firmware on these *very expensive* devices *at all*, much less after adding additional security requirements that will drive their prices into the stratosphere.</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">Oh, and by the way, I doubt that any of these hearing aids (or their firmware) are built in the U.S., so you can assume that their supply chains are very vulnerable to attack (think exploding Israeli pagers in your ears).</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">Open source code for open source hearing aid HW would be a good start, but I would imagine that fulfilling that dream would take at least 5 years, so what do we do in the mean time?</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">[Google Pixel, are you listening ?!?]</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;">BTW, "Code of Silence" is quite a good show, and the lead actress -- who is terrific -- is actually deaf herself.</p>
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