Experimental Investigations of the Influence of Screens and Protective Equipment on the Level of Acoustic Signal in a Room With Glass and Metal Plastic

Abstract

In the digital stage of world development, information is constantly expanding its facets. That is why the exchange of information is a leading component of constant change in life. Although humanity is gradually moving to the use of electronic technology, acoustic information still plays a key role in information circulation. This applies to official communication in public institutions up to the highest level, business contacts in commercial structures and private communication between people. The process of transmitting information in acoustic form has dangerous consequences. The use of appropriate devices, such as directional acoustic microphones or technical intelligence acoustic antennas, which may be outside the scope of the information activity, makes it possible to obtain unauthorized information that should not reach third parties. Therefore, the task of detecting and protecting information leakage channels, including acoustic ones, is gaining a new degree of importance every day. The protection of the premises or building, where acoustic information regularly circulates, provides a set of organizational and technical measures and means of protection of information circulation, taking into account the peculiarities of the location and arrangement of the object. This study involves the study of the dependence of the level of the acoustic signal on ways to prevent leakage of information through the acoustic channel, which includes vibration noise by means of technical protection and coverage of improvised materials (shielding) of enclosing structures of information activities (OID). The experiment determines the degree of influence of density, sound-absorbing properties of materials and their combinations on acoustic oscillations, the source of which is in the OID. The object of the study was a basic room, where the enclosing structures are walls with windows and doors, ceiling and floor. It is also worth noting that the acoustic signal measurements were not performed in complete silence, which directly affected the accuracy of the results. This step was taken in order to best reproduce the conditions in which criminals often work.

Interior Room Influence on the Defence From Laser Acoustic Intelligence Systems

“…В роботі [10] досліджувалась залежність між випроміненням акустичних хвиль та матеріалом будівельних конструкцій приміщення, де знаходиться джерело акустичного сигналу. Експеримент показав, що поширення вібрацій може відрізнятись залежно від матеріалу перешкоди, якою вони поширюються.…”

“…Плюс меблі, бажано не хайтек, скло чи камінь, а краще з клеєного брусу пористих порід, обшитих структурним матеріалом. Це стосується і штор, які мають бути з важких матеріалів насичених кольорів на пластикових карнизах, оскільки, згідно досліджень [10], саме пластик володіє найбільшим затухаючим впливом на сигнал на різних відстанях, потім фольга і найгірше ДСП.…”

“…Табл. 1 побудована за даними досліджень [10]. Тобто, якщо на стінах використовувати відповідне компонування поглинаючих поверхонь, то можна добитись суттєвого покращення захисних властивостей, в першу чергу, зовнішніх параметрів (стін) охоронного кордону.…”