ACOUSTIC CHAMBER Russian patent published in 1998 - IPC

FIELD: radio engineering; construction of radio and sound insulated premises complying with sanitation standard specifications for operating radio and electrical equipment and computers. SUBSTANCE: acoustic chamber has walls forming enclosed space accommodating electrically sealed metal screen attached to internal walls; screen walls mount metal bases supporting ferrite plates made of material containing in its composition nickel, zinc, cobalt, and ferric oxides in definite proportion of masses. Ferrite plates are covered with sound-absorbing panels. EFFECT: provision for preventing radiation of radio and sound waves beyond chamber; reduced strength of electromagnetic fields inside chamber to comply with sanitation standards. 2 cl, 1 dwg