Can anyone here speak to the qualitative difference (in manufacture, attenuation, etc) between purpose-made RAM/MAM, or Radar/Microwave Absorbing Foam Foam and the much cheaper and readily available activated carbon impregnated filter foam ACIF used for water/air/chemical filtration? I am attempting to design a cheap, easy retreat - or "safe space" for ES sufferers and I need some help.

I have looked and looked but can find no real difference. The manufacturers of RAM/MAM are simply impregnating PTFE foam with carbon, sometimes (but not always) with the addition of small amounts of sintered metals/ferrite and as far as I can tell ACIF is manufactured the same way. The RAM/MAM makers offer various attenuated frequency ranges by altering the pore sizes of the material the produce, but ACIF can be had in specifics pore sizes as well.

Has anyone ever tested the cheaper ACIF to see what kind of attenuation/reflection can be achieved. Thanks.

 

Can anyone here speak to the qualitative difference (in manufacture, attenuation, etc) between purpose-made RAM/MAM, or Radar/Microwave Absorbing Foam Foam and the much cheaper and readily available activated carbon impregnated filter foam ACIF used for water/air/chemical filtration? I am attempting to design a cheap, easy retreat - or "safe space" for ES sufferers and I need some help.

I have looked and looked but can find no real difference. The manufacturers of RAM/MAM are simply impregnating PTFE foam with carbon, sometimes (but not always) with the addition of small amounts of sintered metals/ferrite and as far as I can tell ACIF is manufactured the same way. The RAM/MAM makers offer various attenuated frequency ranges by altering the pore sizes of the material the produce, but ACIF can be had in specifics pore sizes as well.

Has anyone ever tested the cheaper ACIF to see what kind of attenuation/reflection can be achieved. Thanks.

have you tested it any good performance?

 

From Wikipedia:

Foam absorber[edit]
Foam absorber is used as lining of anechoic chambers for electromagnetic radiation measurements.[citation needed] This material typically consists of a fireproofed urethane foam loaded with conductive carbon black [carbonyl iron spherical particles, and/or crystalline graphite particles] in mixtures between 0.05% and 0.1% (by weight in finished product)

Activated carbon, also called activated charcoal, is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions.

Seems you haven't searched very much. Different product design and use. Somewhat like asking why is diesel fuel more expensive than gasoline, or why wheat flour is $0.74/lb compared to Wheaties which is $3.89/lb.