Experimental Studies of the Stand of Simulation Modeling of Laser Microphone Operation for Removal of Acoustic Information

Abstract

He who possesses information owns the world. This statement is becoming more relevant every day. It is information that has become a tool for modern management and development. Therefore, the role of information technology is also constantly growing along with the risk of their malicious use. Attackers use all possible methods and means of technical intelligence to use potentially possible and create new types of information leakage channels to intercept it. object of information activities. Such oscillations caused by a certain speech (acoustic) signal can be intercepted by means of long-range intelligence. Most often, a laser microphone is used as such. The essence of its action is to emit a laser on the surface of the selected OID, which circulates a speech signal that creates sound vibrations on this surface. The movement of the surface leads to the modulation of the wave by phase, which is manifested in the variable nature of the sound signal Doppler shift of the frequency of the received signal. Often, such a surface is the glass of the windows, which reflects the beam to the receiver, to which is connected a detector that can reproduce the sound from the OID. This study aims to study the dependence of the laser microphone on such factors as: the location of the radiation source and the beam receiver from the membrane; membrane surface material; receiver type; materials of fencing constructions OID. The goal is to create a stand to demonstrate the operation of a laser microphone. The research process is carried out on a smaller scale, which is why an improvised room in the form of a cardboard box was chosen as the OID. Available tools were used to reproduce the operation of the laser microphone, so a laser pointer was chosen as the illuminator, and devices such as a solar panel, a light sensor and a signal amplifier microphone were used as the receiver. The study of the influence of selected factors was performed by measuring the voltage and volume of the acoustic signal using a multimeter and a certified program on the tablet, respectively.