New idea for PC cooling

[Magnus Danielson]

From: "Alex Stettler" <x_ray at hanfi.com>
Subject: New idea for PC cooling
Date: Thu, 10 Feb 2000 08:58:01 +0100

> Hi DIYers
> 
> 
> I had just another idea for cooling a pc on a silent way. How about a
> aluflex-tube, often used for air-conditioning systems and so on? They
> are somewhat bigger in diameter than the outlet of the PC fan. So you
> can take out the fan and connect the aluflex-tube to the outlet and the
> install the the fan in an other room, where the tube ends. Or you can
> terminate the tube in a small wooden box with the fan in it, for
> accoustical isolation.
> But in my case, there's not the cooler fan who's making trouble, it's
> the harddisk which makes the most noise.
> So there's a new question, if there are any possibilities to damp the
> noise of the HD.
> 
> Does it lower the noise somewhat, if you mount the HD with some rubber
> sheet or something similar between the case and the HD?

The bad thing about these aluflex tubes is that sound travels *really* well
in them. You need to solve the issue some other way.

Actually, mounting HDDs in a wagon and use silicon rubber/plate-with-mass/
silicon rubber is a great way to remove noise from HDDs. Basically you lowpass
filter the audio path with a 3 pole filter. It is the physical transmission
path from the vibrating object to some large emission survace that can be
attacked in order to remove disturbing noise. I have a friend that did exactly
this to kill the noise, it really worked. You could only hear some hiss from
the airflow of the fan, but it was not too much.

Cheers,
Magnus