Material that blocks frequencies up to 10,000 Hz?

[DAGTA]

Does anyone know of a material that blocks all frequencies up to 10 kHz?

Thanks!

 

[A5]

Depends on what you need it for and how much attenuation you need. There's nothing I know of that can 100% attenuate 0-10KHz with a single layer, though - blocking the 0-100Hz range just requires a lot of material.

 

[PottedMeat]

yeah you're looking at a bunch of different materials at different thicknesses

 

[TecHNooB]

sound or light?

 

[C1]

A wall made up of bags loaded with sand (ie, sand bags) should do it.

In the case of my stereo system, I built a room inside of a room. The inner room does not touch the outer room, so when the inner room vibrates, the air gap between them is a poor transmitter so one hardly hears anything outside the second room even when playing inside at rock concert levels.

 

[Paul98]

What do you need it for? Depending on what you are doing I may have some suggestions.

 

[Puppies04]

To stop aliens stealing his brainwaves.... tinfoil hat should work

 

[DAGTA]

To stop aliens stealing his brainwaves.... tinfoil hat should work

My brainwaves are higher frequency than this!

I need to block light and sound. It's shielding around a frequency generator to allow for better accuracy with experiments.

Thanks!

 

[Howard]

Pretty much any acoustic barrier is good from 3kHz up... it's the low frequencies that are hard to stop.

Go look up some NRC absorption figures.

 

[Biftheunderstudy]

My guess is a combination of acoustic barriers and perhaps a optics table for the low frequencies? A really good frequency generator will have very good noise characteristics, having some experience in this domain, we never had to worry about shielding the frequency generators for our experiments, and they were quite sensitive.

 

[Modelworks]

What is the amplitude of the frequencies ?
For some of the frequencies you can use this stuff
http://www.goldmine-elec-products.com/prodinfo.asp?number=G16600A

 

[CycloWizard]

Buy an optical table. Put a Faraday cage on it. Wrap it with acoustic foam.

 

[silverpig]

Vacuum

 

[DAGTA]

Thanks everyone!

 

[Howard]

Vacuum

yeah but what about ELECTRONS

 

[Born2bwire]

Yeah, I still don't know if they are talking about sound or electromagnetic waves.

 

[A5]

Yeah, I still don't know if they are talking about sound or electromagnetic waves.

I'm assuming sound, since a 10KHz emag particle would be too low energy to worry about.

 

[Born2bwire]

I'm assuming sound, since a 10KHz emag particle would be too low energy to worry about.

Low frequency noise can be a really pesky problem in circuits. The most obvious is the 50/60 Hz noise you get from the mains but there are other background signals that are out there like the radio signal for atomic clocks. Being low frequency though increases the problem of induced noise and shielding performance.