Electromagnetic fields: principles of exposure mitigation. |
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Authors: | Rosaria Falsaperla Giuseppe Spagnoli Paolo Rossi |
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Institution: | Department of Occupational Hygiene, National Institute of Occupational Safety and Prevention (ISPESL), Italy. |
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Abstract: | Basic principles of reducing exposure to electromagnetic fields are reviewed in this article. Measures to reduce exposure can be divided into organisational/administrative and technical/engineering actions. Both strategies are briefly analysed and the basic principles of the theory of shielding are presented. A definition of shielding effectiveness (SE) is given, and the results from the general Transmission Lines Theory are presented. Practical situations of shielding static and time-varying electric and magnetic fields are discussed on the basis of the physical properties of the fields and of the shield. |
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