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"ANG-2000 Acoustic Noise Generator"

The ANG-2000 is designed to defeat wired microphones inside walls, contact microphones, and laser or microwave reflections from windows. This system is a "direct masking" approach that allows normal conversation while defeating eavesdropping devices that rely on acoustic leakage. Most other sound masking systems flood the environment with high level noise. In this environment, the occupants must raise their voices, competing with the noise level in order to communicate, which invariably eliminates the benefit of noise masking.

The noise masking system consists of a main unit (the ANG)) and three optional accessories:
  • TRN-2000 Transducer used to inject acoustic noise into walls, ceilings, windows, plumbing, and air ducts.
  • OMS-2000 Omnidirectional Speaker used to project acoustic noise into drop ceiling air spaces, closets, and crawl spaces.
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The ANG system, as shown here in a typical application, provides complete perimeter protection for target rooms of concern.

  • TRN-2000 Provides perimeter protection for walls and windows.
  • OMS-2000 Provides protection from ceiling devices (mounted in drop ceilings).


ANG-2000 Acoustin Noise Generator
Size: 1-3/4 x 6 x 10 in (4.4 x 15.2 x 25.4 cm)
Weight: 3.0 lbs (1.4 kg)
Output voltage: 1-12 Vp-p @ 8 Ohms (1/1/2 Ohms min)
Frequency range: 250 Hz - 5 kHz (±3dB)
Power: 115-125 or 230-250 VAC 50-60 Hz 24 watts max

TRN-2000 Transducer
Size: 4 x 1-1/2 in (10.2 x 3.8 cm)
Weight: 2.0 lbs (907g)
Impedance: 6 Ohms
Transducers per Generator:
4 @ full level (parallel)
12 @ 1/2 level (six groups of two)
18 @ 1/3 level (six groups of three)

OMS-2000 Omni Speaker
Size: 5 x 5-3/4 in (12.7 x 14.6 cm)
Weight: 2.0 lbs (907g)
Impedance: 24 Ohms
Speakers per Generator: 12 @ full level

Some surfaces require less energy than others to achieve effective masking, ranging form 1/3 level for windows to full level for masonry walls. Suggested levels for various materials:
  • Block/Concrete - full
  • Drywall/Sheet Rock - 1/2 to full
  • Ductwork/Plumbing - 1/2 to full
  • Windows - 1/3 to 1/2 (May require attenuator to reduce level to 1/2 or 1/3 in mixed systems.)

Prices: ANG-2000 POR
TRN-2000 POR
OMS-2000 POR
WMT - Window Mount POR

Electromax International, Inc.
11152 Westheimer, #905
Houston, Texas 77042

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