On Nov 27, 2005, at 10:22 PM, Charles Weston wrote:
> Any thoughts on making the SHS F units quieter?
>
> Charlie
>
Charlie,
All sound results from vibrations, so to eliminate them you can stop
the vibrations from happening, or you can damp them so they don't
transmit the sound to other objects. It would seem to me that the
motor and gears in the unit would be a source of vibrations. Short of
parking the engine, I don't think you can avoid those noises, so the
next step is to figure out if the noise is being transmitted to other
parts of the unit. What type of unit is it? Is it quieter with the
shell off? Are you using DCC or sound? You could fill up some extra
space in the unit with something that would absorb sound. Many stereo
speakers have a type of poly fiber in them for this purpose, but they
don't have moving parts! Cleverly shaped stryofoam insulation might
work, of maybe some foam tape. It might be possible to put some type
of material between the shell and the frame at the attachment points
that would damp the vibrations. I'm thinking foam tape again. This
could result is some major machine work. The sound could be being
transmitted farther. What type of benchwork are you using? What type
of subroadbed and roadbed are you using? Sorry that all I can provide
is a bunch of theoretical suggestions. If I ever find my sound level
meter, I'm going to make a thorough study of this subject.
Jamie Bothwell
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