DEVICE FOR PROTECTION OF ROOM AGAINST ACOUSTIC AND LASER INTERCEPTION Russian patent published in 1998 - IPC

FIELD: information protection, in particular, prevention of information leakage using acoustic and optical interception. SUBSTANCE: device has frame and sound absorbing layer. Goal of invention is achieved by introduced first and second vibration-quenching insertions, blind plates which are mounted between sides of frame using vibration-quenching insertions and additional layers of sound absorbing material. Frame is mounted in window casing outside room. First vibration-quenching insertion is mounted along external perimeter of frame. Layers of sound absorbing material are located on surface of blind plates and frame and covered by light scattering paint on their external sides. Blind plates are mounted at angle of 30-40 degrees with respect to vertical line for passing light between them. Width of blind plate is greater than vertical distance between adjacent plates by factor of 1.2. Layers of sound absorbing material are made from mineral wool. EFFECT: increased protection. 2 cl, 1 dwg