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 Post subject: Soundwaves are breaking up ?
PostPosted: Thu Feb 14, 2019 11:15 pm 
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Joined: Tue Feb 12, 2019 10:43 pm
Posts: 2
Hello everyone,,
I'm wondering, is it possible to break up a soundwave.... akin to the way you break up a microwave (metal mesh on the door of the microwave oven effectively stops microwaves because they cant pass through it)

I'm thinking, because i want to put a door on the front of my computer "rack".
i'm wanting something that will allow air in relatively unimpeded, but stop some amount of noise from getting out.
Thank you,....


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 Post subject: Re: Soundwaves are breaking up ?
PostPosted: Wed Feb 20, 2019 4:48 pm 
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Joined: Thu Oct 06, 2005 4:36 am
Posts: 7213
Location: Monterey Bay, CA
The mesh in front of your oven blocks microwaves because the holes are significantly smaller than the wavelength. Sound is a little trickier. You can reflect it (think of the front panel on a PC case..there are fans, but the fan intakes are on the sides, so there is no direct path from the inside of the PC to your ears. You can absorb it (very thick foam for higher freq's). You can dampen it (high density material added to inside of case panels dampens lower freq resonances).

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 Post subject: Re: Soundwaves are breaking up ?
PostPosted: Thu Feb 21, 2019 8:05 am 
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Joined: Tue Nov 04, 2008 6:03 am
Posts: 622
Location: Sweden
Just to add some clarification to Steve's suggestion:
Between you and the case you place a plate/slab of some stiff material.
On the side towards the computer it has a layer of something dense, like the bitumen mats used to dampen engine noise in a car.
On top of that layer you add a layer of plastic foam to absorb the noise. There is foam specifically made for this to be found, but it's becoming rare and expensive.


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