Ways to improve the efficiency of methods and means of counteracting unauthorized speech recording and their comparative analysis

IF 0.2 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Visnyk NTUU KPI Seriia-Radiotekhnika Radioaparatobuduvannia Pub Date : 2023-03-28 DOI:10.30837/rt.2023.1.212.07
A. Oleynikov, V.A. Pulavskyi, O.H. Bilotserkivets
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Abstract

The features of using ultrasonic, electromagnetic and acoustic methods to counteract unauthorized recording of speech on sound recording devices are considered. The advantages and unused possibilities of the methods are noted. Ways to increase the effectiveness of the ultrasonic method of counteraction consist in using the two-frequency ultrasonic method, in positioning the device for emitting ultrasonic vibrations no more than two meters from the target, in using high-intensity ultrasonic vibrations, in using the ultrasonic method together with the acoustic method, and others. Ways to increase the effectiveness of the electromagnetic method consist in using amplitude-pulse modulation of the interference signal, narrowly directed antennas, a device with a maximum allowable power, and others; Ways to increase the effectiveness of the acoustic method consist in creating speech-like interference from the speech of the interlocutor (synchronized with speech pauses), reducing the distance between the source of interference radiation and the source of speech in relation to the distance between the interlocutors due to organizational protection measures. (adapted acoustic method). The most promising is the adapted acoustic method having the greatest potential for guaranteed countermeasures, subject to the requirements for its optimal use. Analyzing the results of the experiment, we conclude that the adapted acoustic method is the most effective. The effectiveness of the method confirms the suppression range from 1.8 m to 3.5 m depending on the device, for comparison, in the ultrasonic experiment, one of the indicators was 0.9 m, and in the electromagnetic experiment, even 0 m. The formation of interference through the acoustic channel is higher the described method ensures the universality of the proposed method to the type of device for suppressing unauthorized speech recording, regardless of the underlying method – electromagnetic, ultrasonic or acoustic.
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提高反非法录音效率的方法和手段及其比较分析
考虑了使用超声波、电磁和声学方法来抵消录音设备上未经授权的录音的特点。指出了这些方法的优点和未使用的可能性。提高超声反作用方法有效性的方法包括:使用双频超声方法,将发射超声振动的装置定位在距离目标不超过2米的位置,使用高强度超声振动,将超声方法与声学方法结合使用,以及其他方法。提高电磁方法有效性的方法包括使用干扰信号的幅度脉冲调制、窄定向天线、具有最大允许功率的装置等;提高声学方法有效性的方法包括从对话者的语音中产生类似语音的干扰(与语音暂停同步),减少干扰辐射源与语音源之间的距离,相对于由于组织保护措施而导致的对话者之间的距离。(改编声学法)。最有希望的是适应声学方法,它具有最大的保证对抗的潜力,但要满足其最佳使用要求。通过对实验结果的分析,认为自适应声学方法是最有效的。该方法的有效性证实了根据设备的不同,抑制范围从1.8 m到3.5 m不等,作为比较,在超声波实验中,有一个指标是0.9 m,在电磁实验中,甚至是0 m。通过声学通道形成的干扰较高,所描述的方法确保了所提出的方法对抑制未经授权的语音记录的设备类型的通用性,无论其底层方法是电磁,超声波还是声学。
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Visnyk NTUU KPI Seriia-Radiotekhnika Radioaparatobuduvannia
Visnyk NTUU KPI Seriia-Radiotekhnika Radioaparatobuduvannia ENGINEERING, ELECTRICAL & ELECTRONIC-
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