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 Post subject: A question of Sound
PostPosted: Wed Feb 04, 2004 7:14 pm 
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Black Belt 4th Degree
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Joined: Sun Dec 28, 2003 8:26 pm
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Location: Norwich, UK
Just a general ponder, but if I have a 20dB fan and add another, is the total noise now 40dB???

Also, am I right in thinking that for every 1dB increase it is 10x louder? I heard it somewhere but I might have been dreaming.

Thanx in advance

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PostPosted: Wed Feb 04, 2004 7:16 pm 
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Black Belt 1st Degree
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Youre right about the 10X louder part, but as for the sound "adding up" I dont really think so. It could be tho.

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PostPosted: Wed Feb 04, 2004 7:21 pm 
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Black Belt 4th Degree
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Cheers mate. I was more unsure about the 10x bit and I'm not 100% on the adding but I can hear my noisy fan over the others so maybe not.

me confused, I'm just going to be adding about 3-4 new fans, hopefully around the 20dB mark and that would make 60-80dB louder than it is now!!

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PostPosted: Wed Feb 04, 2004 7:21 pm 
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Enlightened Master
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They do add up, but it's a veery small increase. The biggest increases will come from things blocking airflow - after all - notice how much louder case fans are when put on those damn stamped out sections versus on they're own?


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PostPosted: Wed Feb 04, 2004 7:24 pm 
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Black Belt 4th Degree
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Tru, tru.

I will be hacking about my case + PSU soon just to stop air resistance. Bloomin annoys me that!!

What increase will I get by adding another fan of the same loudness??

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PostPosted: Wed Feb 04, 2004 7:26 pm 
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Enlightened Master
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Something like .1 db - not a whole hell of a lot. As to the hacking, i used wire cutters to remove stamped grills before - very painful, use tin snips!


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PostPosted: Wed Feb 04, 2004 7:29 pm 
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Black Belt 4th Degree
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Just had a look at the back of the case and the PSU will come apart easy, but the rear fan has loads of 2mm holes. Did they want to make it noisy?? That I'll probably leave alone!!

The front as far as I remember is the same, but a spring clean is called for. Maybe next weekend!!!

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PostPosted: Wed Feb 04, 2004 7:31 pm 
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Enlightened Master
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the front makes ne most noise, and can you wait a day or two to do the psu so i can show you my molex method.


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PostPosted: Wed Feb 04, 2004 7:34 pm 
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Black Belt 4th Degree
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Yeh, there's no rush. I have to fix the girlfriends PC first!!

As long as its cheap and an easy bodge ahem, proffessional job, I'm all for it!!

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PostPosted: Wed Feb 04, 2004 7:34 pm 
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Enlightened Master
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meh, it'll be professionally 'nuff.


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