When we talk acoustic waves propagate freely and reach the walls, windows, doors and other building structures. The most of wave's energy is reflected and absorbed. The rest of this energy creates the vibration in the building structure (f.e., in the wall) and is partly reradiated outside the room (see Fig.1).

These processes can occur in all kinds of rooms  and are the main reason of acoustic information leakage. Acoustic information can be intercepted by 'reading' from window glass, room partition walls, heating and water supply pipes.

Sometimes such an interception doesn't need any special technical means. And if special equipment is used - interception is possible even through the main walls. The common and cheap 'folk' methods like loud music, water noise, etc. can't prevent interception if up-to-date technologies are used. If the espionage equipment is outside, even the fact of interception can't be established.

Building of an initially soundproof room is rather expensive. And if room was not initially soundproof, measures taken to improve these properties can cost a vast sum of money.

But how do we prevent the leakage of information via acoustic and vibro-acoustic channels in another way?
The costs of interception prevention can be considerably reduced if the 'Active Protection' methods are used. 'Active Protection' method's main idea is to create an acoustic noise in all building constructions that can become the channels of acoustic information leakage.

The Acoustic Information Protection
Complex TMP-AN3B

Vibration of the Wall

Figure 1.

The main differences between TMP-AN3B Complex and it's functional analogues are:

• Built-in continuous automatic repair control system and a system of complex's elements adjustment;
• Function of the real-time memorizing and installation of different 'working profiles';
• The possible usage as the base of Security Complex of the room;
• Possibility of computer monitoring and remote control (optional).

The main features of TMP-AN3B Complex:

• Rather low projecting and installation costs, that's the result of connection simplicity, maximum flexibility, the possibility of the point noise adjustment and possibility of mounting the elements without prior adjustment setup;

• Higher protection level as the result of statistically independent acoustic noise in all of the information leakage channels;
• Reduced disturbing effect due to possibility of adjustment of integral and every single transducer's noise level.

Name

Application

Generator-Audio-Transducer
AN9S0

Generates an acoustic noise in different cavities (space above the ceilings, ventilation ducts, door tambours, etc.)

'Heavy' Generator-Vibro-
Transducer TMP-AN933

Generates a vibration noise in a massive building structures of the protected room (walls, ceiling, floor, doors, windows, heating and water supply pipes, etc.)

'Light' Generator-Vibro-Transducer
TMP-AN943

Generates a vibration noise in a light (slim) building structures of the protected room (window glass, doors, office partition walls, etc.)

Remote Control Station
TMP-ANS13

Real-time remote control for the protection complex (turning on/off)

Power Supply and
Remote Control Unit
TMP-AN303

Functions as a network adapter 12/220V and as a programming tool for elements of protection complex (during the installation, the real-time control and the repair control)

The other useful features:

• Variety of generators-transducers Fastenings for a fast comfortable and secure complex mounting (8 different types; suitable for wooden, plastic, woodchip, drywall, concrete, brick and many other surfaces);

• New patented Technology and Equipment for mounting generators-transducers on the glass (full congelation in 10... 20 sec);
• Specially developed Software for easy and safe complex installation and support, allows to solve the most of typical problems in an automatic mode.

90 - 11 200 Hz

The number of spectral profiles

10

The integral noise level adjusting step

~2 dB

The maximum number of generators-transducers that can be supplied
by one Power Supply Unit TMP-AN303

75

Generators interface (except TMP-AN303)

ReBus-3

TMP-AN303 interface (during the installation)

Usb 2.0

TMP-AN303 network interface

Q3 Interface (Ethernet),TCP/IP

The real time remote control

Via infrared channel

The maximum time of continuous use

unlimited

Protection Complex power supply

~190... 2S0V/SQ…60Hz