Basic Audio is a free introductory textbook to the basics of audio physics and electronics. The second type of shielding uses a different principle, but is also effective against magnetic fields. Outside the shield, the two fields are in the same direction and the combined magnetic field is increased. With input transformers, which are particularly susceptible to magnetic fields because they have a magnetic core, the shielding often consists of an arrangement combining magnetic and electromagnetic shielding into one composite assembly. Your use of this website constitutes acknowledgement and acceptance of our Terms & Conditions.
As a Sino-Foreign joint venture, Founded in 1992 and registered 65 million USD, United Copper Foils (Huizhou) Ltd. The location of our company is significant, the transportation is convenient, which covers 52 thousand square meters, and the building area is nearly 20 thousand square meters, the general assets amount to 450 million RMB, and the annual production capacity of high grade electrolyzed copper foil is 21 hundred tons. It has been widely known for years that metallized window films, because of their metal content, can cause EMI (electromagnetic interference), and in the process provide a substantial measure of electromagnetic shielding.


If one aims to block the emission of radio signals from a building through glass, the use of certain window films can be an effective way to both maintain outward visibility and provide solar control benefits but also greatly reduce the likelihood of successful electronic eavesdropping. Electromagnetic shielding does not use a magnetic material, but rather one that conducts electric current well, such as copper or aluminum.
As well as providing increased protection, the combination makes the arrangement more effective over the entire frequency range. Our company is the Guangdong high and new technological enterprise, 18 micrometersa€™ galvanized copper foil researched and developed by our company is the Guangdong and National key and new product, which has been awarded the first prize of Huizhou City Technology Progressiveness and second prize of Guangdong City Technology Progressiveness. Radio frequency (RF) interference (or signal disruption) can be either a boon or a bane, depending on one's special needs and purposes. As a product component in a carefully planned shielding project, though, these films will certainly prove to be of profound value. When the magnetic field causing the induction fluctuates, it causes current to flow in the shield.
Because it depends on fluctuating fields, this kind of shield is completely ineffective against steady magnetism.


The magnetic shielding takes care of frequencies down to zero or d-c and begins to become ineffective at frequencies between 60 to 300 cycles.
This current in the shield sets up its own magnetic field that opposes the original inducing magnetism, and the two fields tend to cancel inside the shield. It is also comparatively ineffective against low-frequency fluctuation, and only becomes really effective at higher frequencies. The electromagnetic shield^on the other hand, begins to become effective between 60 and 300 cycles, and the combined protection is effective for all frequencies.
In 2005, approved by the Guangdong Technology Department, Guangdong Electrolyzed Copper Foil Engineering Technology Research and Development Center is established.



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Rubric: Electromagnetic Pulse Shield



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