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I use simple earphones which are wired with my laptop. Most of the times I unconsciously plug them in without looking and at times instead of going in the port they touch the laptop body near the port instead. Whenever I do so I hear some static in the earphones as I've already tucked them in my ears. What's the reason for this?

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    $\begingroup$ Improper signal grounding and just charges are flowing where they're not supposed to be and your earphone speakers are sensitive enough to respond. Static, for example. $\endgroup$ – DKNguyen May 29 at 19:21
  • $\begingroup$ @DKNguyen does this mean my laptop body is leaking out charges? I sometimes so get a light shock at one of the edges of the laptop, is this also a consequence of this? $\endgroup$ – FoundABetterName May 29 at 19:37
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    $\begingroup$ Not necessarily. Remember that your earphone speakers respond to an audio signal that is only a few volts. Humans can only feel static shocks that are as low as about 3000V. So there's a lot of static discharge that you cannot feel that your earphones are sensitive enough to react to. $\endgroup$ – DKNguyen May 29 at 19:42
  • $\begingroup$ @DKNguyen Alrighty! Thanks $\endgroup$ – FoundABetterName May 29 at 20:38
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    $\begingroup$ FYI: Old-school piezoelectric earphones and headphones can reproduce audible sound from signals containing only picowatts of energy. $\endgroup$ – Solomon Slow May 29 at 22:02

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