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Thread: How do you measure rumble through a bearing?

  1. #11
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    As a somewhat off topic aside. I have a test CD that is good for checking what you can actually hear from your system. Sweep tones and various fixed frequencies, etc. I learned I can't discern above 10kHz . But I get audible output at 30Hz in my small room, which theory says I shouldn't be able to do.
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  2. #12
    Join Date: Jan 2009

    Location: Deleted

    Posts: 6,585
    I'm Deleted.

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    If testing an idler drive you will find the majority of the noise comes from the motor and may well swamp bearing noise and differences of.
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