When plugging in or pulling out a speaker audio jack, what causes the buzzing sound to be heard on the speaker?

In scientific/physical explanation, 

When plugging in or pulling out a speaker audio jack, what causes the buzzing sound to be heard on the speaker?

4 Answers

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  • 1 month ago
    Favourite answer

    at some point while plugging or unplugging you have the signal connection (center) without the ground (outer connection) which means one of the components are ungrounded and pickup 60 Hz (50 Hz in non US) which cause the buzzing noise you near. 

    Actually 50/60 Hz is a fairly low frequency, which would be heard as a low hum, but apparently your speakers cannot reproduce that frequency, so all you hear is the harmonics of that frequency, hence the buzzing, not the hum...

  • 1 month ago

    You are hearing the ripple on the Power supply.

    Don't plug in and unplug speakers with the outputs turned on, you can damage the speaker.

  • Dixon
    Lv 7
    1 month ago

    You really shouldn't be pulling speaker jacks out when the amp is on.

  • 1 month ago

    IT CALLED CONTACT NOISE !

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