Re: How to stop vibrations!

[Stephen McGarry <stephen@xxxxxxxxxxxxx>]

The three main factors in sound insulation are sealing, mass and
isolation. So you are on the right track with the
concrete slab with foam on top (you could also leave the thin tile between
the slab and the mdf). As its transferred
sound not air borne there's nothing to seal.

HTH
Stephen

P.S. It might be necessary to increase the thickness of the MDF to hold the
weight of the slab

On 22/01/11 22:01, Wayne Harrison wrote:
> Hi all,
>
> I've just moved my servers into residence at node 0 (ok a cupboard on
the landing)
> and am having a problem with vibration. I think it's from the fans
that cool the motherboard or psu. They are a pair of
> Dell sc440 servers ( only one is powered at the min) which have quite
big fans. I don't think simply disconnecting the
> fans is an option as the heat is quite high at the min. Don't get me
wrong, these are not loud 'winey'(sp) servers with
> screaming fans, have enough of that from the switch! It's a deep
rumble that's the problem, typically it vibrates
> through the upstairs.
>
> I've got both of these on a platform that's about 5" off the
floor, fixed to the wall on three sides and battened from
> the floor at the front ( this was to clear some pipes that were at the
back of the cupboard). The platform top, which is
> 6mm mdf, has a soundproof 'tile' you typically put under laminate
flooring under it in my first attempt at dampening out
> the noise. I've now got a 10ish mm foam (ex exercise) mat under the
servers as well (on top of the mdf). The idea being
> as to not give these a soundboard to vibrate on but, hence my post
here, this isn't working as I would like either.
>
> My only other thought was to get a concrete slab and use that as the
base of the platform to solidify it rather than
> cushion.
>
> Has anyone else come across this problem and how did you fix it?
>
> Cheers
> Wayne.
>
> Sent from my iThingy
>
>


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