How loud is loud?

[Blackphoenix]

right now I have several fans in a cheap case, fairly loud and I was looking at getting a new case.

The new case has two 80mm fans at 33db and 2 120mm fans at 44db.

Can anyone give me an idea of how loud that really is?

[ALBPM]

<FONT SIZE=4>Can you hear me now??...<FONT SIZE=3>How about now??...
<FONT SIZE=2>Can you hear me now??...<FONT SIZE=1> How about now??...

Paul

[Agent31]

it's loud when it's annoying you

[az]

Almost every computer (including mine, sadly) is too loud. Some are just WAY too loud.

AZ

[103er-Fan]

I heard that the most silent PC are using only fans which are under 21db, while the most over 30db seems to become loud.... I heard that 40 and more would be really annoying and should be only used if heavy cooling is important while totally ignoring the noise.

[GT98]

Originally posted by ALBPM
<FONT SIZE=4>Can you hear me now??...<FONT SIZE=3>How about now??...
<FONT SIZE=2>Can you hear me now??...<FONT SIZE=1> How about now??...

Paul

Oh so your the Verizon wireless guy now?

[[Ch]amsalot]

If it's loud enough to melt your gonads and/or fuse atoms, it's too loud. I can recommend a good attorney.

-[Ch]ams

[impact]

Everytime you say the word attorney, blurred images of bats, Raoul Duke and his partner all come to my mind.

[Dr Mordrid]

What someone needs to do is attack this problem from the reverse direction: active noise control.

A signal processor detects the ambient sound and generates the same signal in realtime and at the same db level but 180 degrees out of phase. This signal is then output through a speaker. The net effect is that the original sounds pressure wave is cancelled out.

This technique is already in use in some automobiles using the audio systems speakers, but is targeted for many other applications in the future including aircraft cabins etc. No reason it couldn't be applied to computer guts.

Dr. Mordrid

[Wombat]

Sure there is. The nature of the sound radiation. Silencing an interior space like ducting or a plane/car cabin is one thing, but trying to cancel out a noise generator like a case is a nastier problem.

[Dr Mordrid]

Actually I would suspect the fans would be the target. Given that they are regular, as in fairly consistant, sounds they should be easy to cancell out. This would work much as the devices being developed to cancell out aircraft engines & prop noise.

IF you do this inside the case then the case itself shouldn't have much to react to. At worst a secondary system using the computer speakers should finish off the job externally.

Dr. Mordrid

[103er-Fan]

Well, I got my Parhelia today, so I also installed my new mainboard and a new CPU cooler... it is a Coolermaster HHC-001 Heatpipe, according to www.pc-cooling.de the fan is around 47db and all I can say that it IS loud!
It sounds like I have somekind of plane on my left side, I haven't closed my case yet though... but I don't think that it will help much to close it.

[ALBPM]

Here ya go......



No more fan noise

Paul

[Technoid]

[Rant]
CoolerMaster HS's Suck! (OK, OK, Technically they blow )

A good HS design works well with a low rpm fan and scales up with faster ones! (Thermalright, Alpha…)

A bad design that needs a HIGH amount of airflow just to cool a 2-year-old CPU (P3 800)!
(Powercooler, a few thermaltake’s(do I have to say ORB?), to many Colermasters!)

A customer came in with a computer that didn’t work!
He suspected the memory! (I suspected him….)
I was right!
The POS Coolermaster he had bought together with his XP1900 was mounted backwards!
That was a “new” Colermaster HS that were “certified” to XP2000! (Where do they certify them? On Antarctica!?!?
Went down in the basement to my “old POS HS” drawer.
And guess what I found!?!
The SAME HS! But that one was 2 years old!!!
So their formula must have been: Take insufficient HS and connect it to loud and whiny FAN!
That Fan was Noisy, ineffective and expensive!!! (it will be when the CPU boils away!)
[/Rant]

[mhm]

Alpha HS and Papst fans, now there's a nice combination. Now the noise from those two HD's starting to get annoying...

Max