Protection for walls, window and doors. The device offers protection against electronic Stethoscopes, Stethoscope sender and Laser directional microphones. A contact resonator is placed on a wall or sill where you suspect the threat comes from and is connected by means of cable with the drive unit. The noise generator produces a strong signal and makes eavesdropping almost impossible with the above mentioned products. Delivery: with 4 contactresonatoren, expandable over 16 rooms Specification tension provision: 12V network component NF-Spectrum: exit optimizes on frequenz (seegraphics) : 2 canals adjustable (16 exits) cable length per Kontaktresonator: 5m Description operation instructions: The noise generator sends out a rustling, with which the microphones of countersurveilance well known today become "clogs". Therefore only an incomprehensible result can be transmitted. The rustling is clearly audible in the room. However it disturbs persons fewer because persons hear "through two ears" deliberately and differentiated. Sounds important we filter therefore for us even if noise surrounds us. Abhörtechnik cannot control this "intelligence", is moreover a differentiation with a microphone not possible. The rustling represents a regular „frequency chaos“, which impossibly makes the transmitting of intelligible signals. One sees prevent should this effect also again and again in espionage film, the famous „running water tap“, whose rustling a monitoring.. . The Kontaktresonator deliver is a real rustling over the Sprachband, in which room, that on 2 canals adjustable to volume. It so should be adjusted that it is clearly audible, but particularly does not disturb also in normal conversations. A wall is assumed, out of which monitored become could, are to be mounted the Resonatoren there and/or are to be arranged there there. A monitoring of the relevant room and/or area through microphones, minus transmitter and / or Stethoskope becomes so impeded and/or prevented. The more loudly the rustling is adjusted, all the more more effective the system becomes. So aimed can rooms and/or area protected become whereby the level variably is and can reduce become also as required. The Kontaktresonatoren are glued simple on the wall, window, door etc. (Klebemasse lies in). Eighth you on firm pressure of the area. A monitoring of the relevant wall etc. with Stethoskopsystemen or Laserabhörsystemen so is prevented. So aimed can walls and disks which abhörgefährdet are, protected become.