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Research Electronics International
ANG–2200 Acoustic Noise Generator
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14 day refund
24 month warranty

ANG-2200 is an acoustic noise generator made to protect your privacy and conversations from various unwanted listening devices in walls, ceiling, windows or similar. 

Whether it's wired microphones inside walls, audio transmitters in AC outlets, contact microphones, or laser/microwave reflections from windows, the ANG-2200 effectively shields your room from eavesdropping attempts by producing a protective perimeter of sound that disrupts any possible voice leakage.

No matter if you are conducting a high-stakes business negotiations or discussing classified governmental matters, this device ensures your conversations stay within the intended perimeters.

ANG–2200 Acoustic Noise Generator works by generating true random noise. This type of noise is unpredictable and natural, making it impossible for eavesdroppers to anticipate the pattern and extract your conversation. The noise is injected into the chosen area perimeter, but not the area itself, so you will still be able to talk freely within the room. 

There are a number of accessories that are used to customize the system to fit a specific environment. These include the TRN-2000 Transducer for injecting acoustic noise into various structures, the OMS-2000 Omni Directional Speaker for projecting masking noise into open air spaces, and the WMT-2000 Transducer Window Mount for secure mounting on window surfaces. The ASA-2000 Acoustic Spectrum Analysis Software and Acoustic Leakage Probe further enhance your setup, helping you understand how sound is being absorbed in your environment and enabling you to set ideal noise masking levels, without being too loud or disruptive.

The device also includes a feature called tailored voice masking. The ANG-2200 is engineered to emit noise in the frequency range that carries most of our speech - from 300Hz to 3000Hz. This makes the masking noise very efficient at protecting speech, while also ensuring a comfortable noise level in the room.

The dual-channel control allows each noise channel to be adjusted based on the material of the surface it is applied to. For example, one transducer could be set to create noise for a glass window, while another could be set for a wooden wall. This ensures that the masking noise is always effective, regardless of the room's structure.

For quick and easy setup, there's also the ANG-2000 Rapid Deployment Kit. This kit includes all the accessories needed to set up the ANG-2200 system in a medium-sized area like a conference room. The whole system is stored in a rugged carrying case for easy transport and storage.

Learn more about complete REI TSCM equipment available at SpyShopEurope.com.

ANG–2200 Accessories:

  • TRN-2000 Transducer: Injects acoustic noise into walls, ceilings, windows, plumbing, air ducts, and other structures vulnerable to acoustic leakage.
  • OMS-2000 Omni Directional Speaker: Projects masking noise into drop ceiling air spaces, closets, crawl spaces, and other vulnerable open air spaces.
  • WMT-2000 Transducer Window Mount: Used for securely mounting the TRN-2000 transducer to window surfaces.
  • ASA-2000 Acoustic Spectrum Analysis Software: Allows you to understand how much sound the structures in your environment are absorbing. You can then use this information to correctly set the noise masking levels. This software comes with the Acoustic Leakage Probe.
  • Acoustic Leakage Probe: Optimized for voice use with a low noise high output element and used with the ASA-2000 software to evaluate the extent of structure-bound audio leakage.

ANG–2200 Main Features:

  • Protects from any eavesdropping devices within a room
  • Generates true random noise, naturally generated and completely unpredictable
  • Dual channel control for use on different structures (wood, window, plumbing, etc)
  • Masking system generates noise for the perimeter, not directly into the area allowing normal conversation within the room
  • Acoustic Spectrum Analysis Software for adjusting noise to your needs
  • Flexible system configuration and customizable to the area

ANG-2000 Rapid Deployment Kit:

The Rapid Deployment Kit is designed for a quick and easy setup of the ANG-2200 system in a medium sized area (eg.conference room). All the accessories are stored in a durable carrying case for convenient transport and secure storage. 

It includes:
  • 2x ANG-2200 Acoustic Noise Generator, 
  • 24x TRN-2000 Transducers 
  • 2x OMS-2000 Omni Directional Speakers, 
  • 24x WMT-2000 Transducer Window Mount, 
  • ASA-2000 Acoustic Spectrum Analysis Software, 
  • Multimeter with cables, 
  • Wire stripper,
  • Screwdriver,
  • Needle nose pliers,
  • 1/4” socket bit,
  • 2 Spools 500 ft (152 m) wire, and 
  • Portable case with casters

ANG–2200 Specifications: 

Independent random noise source
Output voltage: 12 Vp-p @ 6 Ω (2 Ω min load)
Frequency range: 125 Hz - 4 kHz
Equalizer: LF 180 Hz ± 12 dB, HF 3 kHz ± 12 dB

15 VDC @ 1 A (AC adaptor supplied for 120 or 240 VAC)

Unit dimensions: 1.6 x 5.5 x 8 in  (4.1 x 14.0 x 20.3 cm)
Unit weight:  1.3 lb. (590 g)

TRN-2000 Transducer
With wall mounting and connecting hardware
Size: 2.875 in x 1.25 in (7.3 cm x 3.2 cm)
Weight: 0.9 lbs (408 g)
Impedance: 6 Ω
Max Transducers per Channel:
3 @ full level (parallel) 
12 @ 1/2 level (six groups of two) 
27 @ 1/3 level (six groups of three)

OMS-2000 Omni Directional Speaker
Size: 5 in x 53/4 in (12.7 cm x 14.6 cm)
Weight: 2.0 lbs (907 g)
Impedance: 24 Ω
Max Speakers per Channel:
 12 @ full level

Acoustic Leakage Probe
Frequency Response: 50 Hz to 10 kHz 
(Surface Dependant)
FET Preamp Bias: 3 to 9 VDC
Sensitivity: Optimized for voice use/low 
noise high output element
Impedance: 2 kΩ

Rapid Depleyment Kit:
Weight Packed: 75 lbs (34 kg)
Exterior Dimensions:
(LxWxD) 25 in x 20 in x 12 in 
(63 cm x 50 cm x 30.2 cm

ANG–2200 Acoustic Noise Generator Feature Focus: 

True Random Noise

Unlike conventional noise generators that produce pseudo-random noise (predictable noise patterns created from a mathematical formula or pre-calculated list), the ANG-2200 produces truly random noise generator. This generator produces noise that is naturally created and completely unpredictable. The unpredictability protects against sophisticated eavesdropping techniques that may be able to decode predictable noise patterns, therefore enhancing the security of your conversations.

Tailored Voice Masking

The ANG-2200 has been designed to focus on the frequency range that carries intelligible speech (300Hz to 3000Hz). This means the noise masking is more efficient, providing an extra layer of protection for your speech, while also maintaining a comfortable noise level in the room that doesn't disrupt your normal conversations. 

Flexible Operation

The ANG-2200 uses a mix of transducers and speakers, which are strategically placed around the target area to create a complete noise blanket. Each transducer can be attached to surfaces such as walls, windows, ductwork, and plumbing, and each speaker can inject masking noise into drop ceiling air spaces, closets, crawl spaces, and similar, enabling them to adapt to a wide variety of environments and structural elements.

Dual-Channel Control

With the ANG-2200's dual-channel control, each channel can be tuned according to the material of the surface it's applied to. This means that you can have one transducer generating noise for a glass window and another one for a wooden wall at the same time, each optimized for its surface, ensuring that the noise effectively masks your conversations no matter of the room's structure and materials.

ASA-2000 Acoustic Spectrum Analysis Software 

This accompanying advanced software helps you tailor the noise generation to your specific needs. It enables you to evaluate the structure-bound audio leakage in the environment and adjust the ANG-2200 accordingly. This ensures that the device provides just the right amount of masking noise, optimized for your specific environment, without being too loud or disruptive.


For more detailed specifications, please carefully study the PDFs available for download below.

24 Months Warranty
ANG-2200 User Manual
>>Download detailed specifications (PDF)<<


Disclaimer: Items on the website are not be used for the purpose of illegal surveillance of unsuspecting subjects. The items are to be used only in compliance with all the local laws and regulations under the threat of penalty.

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