RU207532U1 - DESKTOP WITH LEAKAGE PROTECTION OF ACOUSTIC INFORMATION - Google Patents

Abstract

The utility model relates to furniture and can be used as an element of an office interior. The technical result of the utility model, which consists in ensuring information security of work by preventing hidden access to confidential acoustic information, reducing labor intensity and the likelihood of errors by eliminating the need to divert attention to maintenance, periodic recharging of the device, increasing the safety of use by excluding any or emitters, is achieved due to the fact that the bedside table of the table with protection against leaks of acoustic information includes a body and at least one drawer, the bottom and inner side surfaces of which are covered with sound-absorbing material. 3 C.p. f-ly, 1 dwg

Description

The utility model relates to furniture and can be used as an element of an office interior.

In practice, situations may arise when negotiations or other discussion of issues that constitute the trade secret of the organization are taking place in a room, for example, in an office, study or meeting room. In these cases, measures are taken to ensure information security, aimed at preventing not only unauthorized access to confidential paper documents, but also secret removal of acoustic information from the premises.

There is a big problem - the acquisition of acoustic information (conversations) using various devices. Moreover, such information can be filmed secretly, using, for example, a telephone belonging to a person. Often, for these purposes, various programs are secretly installed in this one, which produce such an unauthorized recording (for example, such programs - https://w3bsit3-dns.com/forum/index.php?showtopic=541212 https://bsr.ag38.ru/ ? lang = ru).

To prevent this, in particular, so-called acoustic safes are used. Known acoustic safes are made in the form of half-open or closed cases, including non-metallic materials, including special devices for generating noise interference, for example, ultrasonic emitters.

Known acoustic safe "Ladya", made in the form of a desktop stand for pencils, including an indicator of the strength of the electromagnetic field and an automatic noise generator (Ladya. Acoustic safe. [Electronic resource]. URL: https://hardbroker.ru/catalog/producs/view/ 262: date of access: 24.07.2021). The mobile communication device is placed inside a "pencil holder". In the case of tacit remote activation of the telephone in listening mode, the only unmasking sign is a change in the strength of the electromagnetic field (since the transmitter of the mobile communication device is unauthorizedly switched on to transmit). This change is recorded by the field indicator, which is part of the device, which gives a command to automatically turn on the acoustic noise generator. The level of acoustic noise at the microphone input of a mobile communication device is such that it is impossible to listen to conversations in a nearby space.

The disadvantages of the known solution include the impossibility of protecting non-acoustic confidential information with its help, for example, documents on paper, CDs, etc.

The closest in terms of the totality of essential features - the prototype of the claimed utility model - is a table bedside table containing drawers, and the inner surface of one of the drawers and part of the countertop facing it have a special coating for physical impact on business tools placed inside the box (US Pat. RU 142987, publ. 10.07.2014. Bull. No. 19). According to the well-known solution, the business tools are the tools of the master of manicure, the coating is a reflector, and the physical effect consists in irradiating the tools with ultraviolet light.

The disadvantages of the known solution include the impossibility of providing with its help the isolation of objects inside the box from electromagnetic waves.

The technical problem to be solved by the present utility model is to eliminate the shortcomings of the prototype - to create a design for a table bedside table that reduces the likelihood of eavesdropping with devices that may contain a microphone (computers, telephones, bugs, etc.), located in its internal space, the room in which it is located, as well as an additional technical task is to ensure the physical safety of these devices (protection against theft) and reduce the likelihood of removing any information over the radio channel.

The solution to this technical problem is achieved through the combined use of the following constructive measures:

-implementation of a table bedside table with one or more drawers;

the use of one or more drawers of the bedside table to accommodate confidential information carriers and / or devices with which hidden access to confidential information can be realized;

the use of isolation of the inner cavity of a drawer used to accommodate devices from which leakage of acoustic information is possible with sound-absorbing materials as a means of protecting confidential information from access using mobile communication devices.

The sound-absorbing element can be made in the form of fabric, non-woven material, etc. (not the subject of the application).

The author has carried out a series of experiments. For the experiments, we used an acoustic fabric "Bauman" (https://fabricmoscow.ru/catalog/akustika/). These fabrics stand the test of ISO / EN 354, ISO 11654 and DIN EN 29053 and are of unrivaled quality in every sound range. Acoustic fabrics allow you to control and optimize the influence of extraneous noise, providing not only pleasant acoustics, but also attractive design solutions.

In this case, several types of fabric were used with a single NRC value from 0.4 to 0.9 (https://www.creationbaumann.com/en/Acoustic-fabrics-for-acoustics-and-aesthetics-in-harmony-18707.html ).

A single NRC value was calculated as the arithmetic mean of the sound absorption coefficient at acoustic frequencies of 250 Hz, 500 Hz, 1000 Hz, 2000 Hz (see https://stroy-master.com/consult/konsmatl.php).

This coefficient was chosen because it is calculated for sound absorption in the acoustic range from 250 Hz to 2000 Hz, which roughly corresponds to human speech (which must be weakened as much as possible to solve a technical problem).

A bedside table with two drawers was used for the experiment. The bottom and inner side surfaces of one of the boxes were covered with sound-absorbing material (fabric from factories). Different fabrics were used with an NRC coefficient from 0.4 to 0.9. The second box was not covered with this material.

During the experiment, a Samsung Galaxy A12 recording device was placed in such a box (https://www.citilink.ru/product/smartfon-samsung-galaxy-al2-sm-al25f-sinii-1452260/?mrkt=msk cl & utm medium = cpc & utm campaign =% 25D0% 25Al% 25D0% 25 BC% 25D0% 25B0% 25D1% 2580% 25D1% 2582% 25D1% 2584% 25D0% 25BE% 25D0% 2 5BD% 25Dl% 258B & utm source = xml ymarket msk & utmNG = 214 SAMS SM-A125FZBUSER & utm term = 1452260% mclid = 16318527684755743711100002), and acoustics were recorded (boxes were moved). The source of acoustics is human speech at a distance of 1 meter.

As a result of the experiment, it was found that even when using material with NRC 0.4, significant results are noticeable. Thus, a whisper and quiet speech recorded by a device in a closed drawer with noise isolation was practically illegible. Whereas the same speech, recorded by a device in a box without noise isolation, was legible enough to understand the meaning of the transmitted information.

Thus, the experiment showed that the use of sound-absorbing material with NRC 0.4 already significantly reduces the likelihood of eavesdropping with devices that may contain a microphone (computers, telephones, bugs, etc.) located in its internal space. , the room in which it is located.

The design of the table bedside table proposed as a present utility model is illustrated by drawings (Fig. 1) and includes a body 1 and drawers 2.

FIG. 1 shows an example of the proposed table bedside table, in which two drawers are installed 2. This does not exclude other versions differing in the number of drawers 2. Drawers 2 can be equipped with protection devices against unauthorized extension (not shown in the figure). As such devices, various locks known from the prior art can be used. Their specific design and construction are not protected by this application. Also, the number of boxes to ensure protection of devices against acoustic information leakage can be different (at least one), for example, 1 with leakage protection and 3 ordinary ones.

The bottom and inner side walls of the drawers are covered with sound-absorbing material.

An embodiment of the device with a horizontal partition is also possible. Under each drawer then, irrespective of their number, a horizontal partition can be arranged, installed with a gap between the drawers and rigidly fixed in the housing. In such a case, it is advisable to cover the surface of the horizontal partition on the side of each drawer and the horizontal surface of the body facing the inner space of the upper drawer with sound-absorbing material. The method of fastening the material can be any known from the prior art.

The bedside table offered as a real useful model works as follows.

Before starting work, for example, before a meeting or other discussion during which confidential information will be announced, devices are placed in the drawer (s), from where the acoustic information of the meeting participants can leak. You can also put other confidential information carriers there, for example, secret documents on paper, CDs, flash drives, etc. Drawers are pushed into the table. Drawers can be closed with anti-tampering devices.

The material absorbs sound, therefore, even if an intruder secretly activates the microphone of a mobile communication device located in a drawer, it makes it impossible to listen to acoustic information in the space surrounding the bedside table.

After completion of the work, mobile communication devices and other media of confidential information are removed from the drawers.

To prevent the removal of any information from devices that have a radio channel (in addition to acoustic information, for example, location information, etc.), in addition to the use of sound-absorbing material, the bottom and inner side surfaces of the drawers can be covered with material, contributing to blocking the passage of radio waves.

Such material will help block the passage of radio waves and, due to this, prevent the remote covert activation of microphones, cameras and the receipt of other information transmitted over the radio channel from mobile communication devices and other similar devices (where transmission over a radio channel is possible).

It is possible to use Aaronia-Shield fabric as a material.

This material has the following characteristics:

Frequency range of shielded signals 108 dB at 1 kHz,

100 dB at 1 MHz,

60 dB at 100 MHz,

44 dB at 1 GHz,

30 dB @ 10 GHz

Shielding efficiency Against static fields: 99.9999% to 99.99999% (grounded only)

Weak electrical fields: 99.9999% to 99.99999% (grounded only)

Material Stainless steel

Color Stainless steel

Temperature limit 1200 ° C.

Obviously, the use of such material will not give a 100% probability of blocking any radio signal in the range from 900 MHz to 3 GHz inside such products (all major digital standards work in this range - Wi-Fi, GSM, Bluetooch, etc.), but will significantly reduce the likelihood of removing such information (depending on the location of the radio signal transmitter).

The technical result of using the proposed utility model is to ensure information security of work by preventing hidden access to confidential acoustic information, reducing labor intensity and the likelihood of errors by eliminating the need to divert attention to maintenance, periodic recharging of the device, increasing the safety of use by eliminating any emitters.

Claims (4)

1. Nightstand of a table with protection against acoustic information leakage, including a body and drawers, characterized in that it includes at least one drawer, the bottom and inner side surfaces of which are covered with sound-absorbing material. 2. The device according to claim 1, characterized in that the part of the device body facing the upper drawer is also covered with a sound-absorbing material. 3. The device according to claim 1, characterized in that it includes at least one drawer, the bottom and inner side surfaces of which are covered, in addition to sound-absorbing material, also additionally with a material that prevents the propagation of radio waves. 4. The device according to claim. 1, characterized in that the drawers are equipped with protection devices against unauthorized extension.

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