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RE: bearing and/or motor noise can't be dissipated or eliminated by the armboard ...

Lew is absolutely right on the physics. Some of the vibrational energy will be reflected backward at the material interface, and some will be dissipated (released as heat) on its way through the armboard. Yes, you'll still be able to hear bearing and motor noise with a stethoscope on the armboard, but there is no way it will be at the same amplitude as at the source. These materials are not perfect sound conductors.

Of course armboard or plinth material should not be thought of as a "band-aid" for a noisy motor or bearing either. It's obviously better to have a quiet motor and bearing to begin with, which I imagine is the point Tbone is trying to make.


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  • RE: bearing and/or motor noise can't be dissipated or eliminated by the armboard ... - rebop 06:51:29 03/15/12 (0)

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