None of the others in town have these, thought it was unusual enough to share
this post was submitted on 18 Dec 2023
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I’m not an expert in electricity and magnetism by any stretch of the imagination, but the way that I understand it is with any electrical current, there is an induced magnetic field, and vice versa. So the little parasites the article is referring to are the magnetic fields induced by the current to play the audio in the speaker. That magnetic field is the signal that triggers the antitheft device.