MNG-300 Rabbler Noise Generator

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The Rabbler MNG-300 protects against all types of eavesdropping.

The Rabbler MNG-300 generates noise which has proven to be more effective than white noise for the protection of critical conversations.

The noise generated by the Rabbler was created using real human conversations and is similar to the noise of a 'rabble' in busy public places. This type of noise is the most effective when creating interference to voice recorders and listening devices, especially when the size of the protective device is critical.

The Rabbler is portable, and was specifically designed for situations when the safety of conversations is extremely important, while remaining as small as possible to allow for discretion and easy transportation.

Kinds of listening devices rendered useless by the MNG-300 Rabbler:

  • Voice recorders
  • Radio microphones
  • GSM/3G “bugs”
  • Body-carried video cameras
  • Wired microphones
  • Any other type of audio surveillance

The MNG-300 Rabbler creates additional barrier interference which masks your speech. It is when a certain noise level is reached that listening devices will record or transmit information, it is extremely difficult, or impossible, to extract the speech component. Since the generator creates a 'speech-like' noise, the cleaning of this sound is extremely difficult or most likely impossible, if the level of noise is sufficient.

The housing of the unit is made from a very reliable material and is extremely durable, guaranteeing a long life for the device.

The size of the MNG-300 Rabbler is comparable to a pack of cigarettes and can even be carried inside one in order not to attract attention, although an attractive leather case is supplied.

How to Use the Rabbler

Please note that the MNG-300 Rabbler is just a tool, complementing and reinforcing the measures taken to protect you from eavesdropping and recording. First of all the security of your conversation depends on yourself, and later from the device. Therefore, during sensitive negotiations it is important not to increase the volume of your voice. Imagine that you are sitting in a crowded coffee shop and do not want to be heard by the people at the next table; that means your speech should not be too loud. If possible, lean forward towards your interlocutor or sit closer to each other, then place the generator on the table between you.

It is not advisable to use only one MNG-300 Rabbler if the number of participants is more than 4. In this situation, it may be necessary to use one or two additional devices. Also, while in use do not hide your generator, e.g. in your pocket or a bag. Your conversation should be "drowned" in noise; therefore the unit should be as close to the conversation participants as possible.


  • Frequency range, Hz: 300 - 3600
  • Power, V: 9
  • Current consumption, mA: up to 120
  • Controls: Power, Volume Indicator, Level
  • Dimensions, mm × mm × mm: 85×53×21

Extra Information

Digiscan Labs