[Gllug] Quiet Fans

[Nick Hill]

Quiet fans are usually so because they rotate slower.

A small decrease in rotational speed can have a big impact on noise. IIRC, someone mentioned a thrust/noise vector of aeroplane engines being ^8 (to the power of 8) and asked if this is the greatest natural non-linear vector. I suspect there are much greater ones.

Try putting a resistor in series with the fan. calculate the value for a 20-30% drop in voltage. R=V/I where R=resistance V=Voltage drop, I=nominal fan current.

Regards

Nick.

On Thu, 28 Feb 2002 16:38:26 -0000
"Jackson, Harry" <HJackson at colt-telecom.com> wrote:

> Hi all
> 
> Can anyone recommend some quiet case fans that are readily available on TCR.
> 
> Regards;
> Harry Jackson.
> 
> 
>      
> 
> 
> *************************************************************************************
> COLT Telecommunications
> Registered in England No. 2452736
> Registered Office: Bishopsgate Court, 4 Norton Folgate, London E1 6DQ
> Tel. 020 7390 3900
> 
> This message is subject to and does not create or vary any contractual
> relationship between COLT Telecommunications, its subsidiaries or 
> affiliates ("COLT") and you. Internet communications are not secure
> and therefore COLT does not accept legal responsibility for the
> contents of this message.  Any view or opinions expressed are those of
> the author. The message is intended for the addressee only and its
> contents and any attached files are strictly confidential. If you have
> received it in error, please telephone the number above. Thank you.
> *************************************************************************************
> 
> 
> -- 
> Gllug mailing list  -  Gllug at linux.co.uk
> http://list.ftech.net/mailman/listinfo/gllug

-- 
Gllug mailing list  -  Gllug at linux.co.uk
http://list.ftech.net/mailman/listinfo/gllug