Portable noise generator


  • Decreases efficiency of voice recorders (intelligibility drops by 90%)
  • Influences radio microphones and stethoscopes with an efficiency of up to 95%
  • Absolutely harmless to your health – no electromagnetic or ultrasound radiation
  • Portable, can be prepared for usage within a second
  • Has a durable case
  • Powered by one 9V battery

The MNG-3000 Skeller generates white acoustic noise in the speech frequency range of 250-4500 Hertz. Sound interference is put onto the recording and makes its quality worse. Due to a uniform distribution of white noise along the whole sound range, clearance of the obtained recording is impossible. The unit should be placed near the designated person to be protected. A digital-analog synthesizer is used to produce the noise. 

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  • 6,300.00 Kr
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