Microphone

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  1. walleyeblugill
    Posts : 910
    WIN10
    Thread Starter
       New #11

    video for laptop i have a dell 755 tower
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  3. steve108
    Posts : 21,421
    19044.1586 - 21H2 Pro x64
       New #12

    walleyeblugill said:
    video for laptop i have a dell 755 tower
    Did you hear the 60Hz hum in the video? Does it sound like your microphone hum?
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  4. steve108
    Posts : 21,421
    19044.1586 - 21H2 Pro x64
       New #13

    It's remotely possible that the AC plug where you have the desktop power plug installed isn't grounded correctly.

    If you have a multi-meter and are comfortable with using it for AC measurements: How to Test Voltage in a Receptacle | Repair and Replace - YouTube
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  6. sandyt
    Posts : 1,223
    Windows 10
       New #14

    Humming can be created by front audio panel sharing a ground with front USB.

    Article: Fix front panel audio EMI noise | TechPowerUp Forums

    Speaker humming can be created by a failed capacitor (which is designed in the circuit to filter out the 60Hz cycle hum)

    Fix your humming speakers - YouTube

    In all 3 cases, humming is usually a grounding issue.
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  7. fireberd
    Posts : 2,585
    Win 11
       New #15

    A Dell OptiPlex 755 is a 2008 era machine. Lots of potentials for hum problems.
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