FIELD: medical engineering. SUBSTANCE: device has chamber with multilayer walls having holes for letting air in. Members for compensating permanent geoelectric and geomagnetic fields and for compensating alternating electromagnetic fields are built-in into them. The members are designed as a system of closed screening members with high electric conductivity and magnetic permeability and electrically insulated one from another. EFFECT: enhanced effectiveness in protecting against external harmful influence of electromagnetic fields of natural and artificial origin. 2 dwg
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