Noiseless mode for hardware.

Simple solution: Add some weight to the resonating surface, That changes the resonant frequency, voila! problem gone! There is some sticky stuff used in cars, to dampen vibrations.

found some adhesived semi plastique sheet stuff used on house construction to weatherproof window frames .

applied over the tyvek, but under the siding, just before the window frame is installed to ensure positive weather e seal.

about 1/16 inch thick, very heavy and flexible.

perfect vibration/sound dampener and electrically non-conductive.

easily scissored to any shape or dimension

I'm in the process of modifying an old PC case to accept a single air duct. A high quality squirrel cage blower in its own case, sitting on the floor, will deliver filtered air through a flexible hose (sump pump hose) to the PC case. This fan, purchased surplus about 12 years ago, moves a lot of air is very quiet, much quieter than any made-for-PC fan I've ever had. I expect it will put the entire PC case at a considerable positive pressure relative to the room, even though "caulking" all PC case cracks and slots and such won't be attempted.

For a while, after its finished, I'll monitor 7 - maybe 8 - areas/surfaces with a string of DS1820 digital thermometers ..... just for grins.

Ok, screws tightened a bit.

And doors pushed against case again.

Humming almost complete gone, as good as gone.

Let's see how long it lasts ;)

Bye, Skybuck.

Hmm since the tightening of the screw now a high pitch noise/humming.

Not good... gotta loose the screw a bit for less high pitch humming.

See screwing in screws tight BAD IDEA ! ;)

Bye, Skybuck.

Yup, as soon as I loosened the screw a bit to high pitching humming became less !

Bye, Skybuck.

Skybuck Flying schrieb:

When i remember my old 386... it wasnt silent... the harddisks and power supplies were very loud!! Its easy to get a silent pc. All you need are the right components. Use Silentmaxx cases, power supplies and harddisk cases. A mainboard with heatpipes instead a fan, a cooler below 20db for the cpu, a graficadapter with passive cooling and you will hear nearly nothing from your pc, without lowering the power of it. And to reduce the noise from your optical drive use a software tool, to lower its speed. I have built computers you dont hear.

I know the fix - hammer a six inch nail firmly into each ear, that should stop the humming.

SteveH

You sure one of your cooling fans doesn't have a bad bearing? On my system there are 7 fans in all and one of them was, indeed, bad.

With the cover off, you may want to "feel" (I used one of my wife's plastic knitting needles) each fan for vibration, at its center. Len