SHIELDING STRUCTURE AGAINST ELECTROMAGNETIC INTERFERENCE OR SOUND FREQUENCY INTERFERENCE

摘要

P Composite structure intended to form screens stopping the propagation of waves at acoustic frequency or electromagnetic waves. /P P It consists of thin films forming alternating layers of metals with relatively high conductivity and metals with relatively low conductivity so as to combine the effects of reflection and absorption in order to maximize the attenuation produced by the structure. It is also possible to use a similar structure formed by layers of materials having different magnetic permeabilities. /P P Application for example to the coating of plastic enclosures of television sets, hearing aids, medical instruments, process controls, calculators, microprocessors and other sources of radiation electromagnetic or acoustic frequency. /P