PBN-TECH MSK – Microphone Suppression Kit – Muti-Directional Ultra Sonic Suppressor – Microphone Defeater


Multi Directional Microphone Suppression Kit, Protect Confidential discussions using Covert or Overt Microphone blocking technology.

  • Prevent unauthorized audio recordings in meeting rooms and offices.
  • Built to Protect confidential discussions from unauthorized recording devices.
  • 2 Ultrasonic Speakers for multi directional protection.
  • Two technologies onboard, ultra-sonic emission (silent) & White Noise Acoustic Interference
  • Protect Discussion areas by strategically deploying MISK towards threats.
  • Can be used Covertly or Overtly
  • Remote Control Operation

       The Microphone Suppression Kit (MSK) is able to neutralize microphones, hidden voice recorders, and audio transmitters, protecting discussions from unauthorized recording devices.

MSK uses silent ultrasonic waves and can overpower all of the microphones within its action range.

This device covers up to 10-11 feet of area,  areas such as offices or meeting rooms, with the use of the main unit plus the additional ultrasonic mini speaker (supplied).

The small form factor of the primary suppressor means users can easily transport the device and use it in the field thanks to the integrated rechargeable battery which can perform for up to 5 hours, protecting an area of about 8 feet when using the primary suppressor on its own.

The Microphone Suppression Kit generates a virtual barrier between the subject and the potential eavesdropping threat, ensuring that confidential communications cannot be secretly recorded.

In addition to the ultrasonic transducers, the central unit has a loudspeaker with separate volume to generate, if necessary and if desired, an audible audio noise similar to white noise.

(Please note that using this additional White Noise feature is not recommended for covert requirements.)

Using the MSK

The device must be positioned with the transducers facing the possible position of the interception devices (environmental recorders, hidden microphones, audio bug transmitters, etc.). For example, towards new guests, which represent non-neutralizable threats where audio recorders on cell phones, tablets, or other devices may be secreted into a confidential meeting.

The primary device must be positioned directly towards the target at a distance of less than 8 feet away.

In most cases, a meeting between 2 parties will be much closer than 8ft.

The optimal maximum distance between the transducers and the interceptor microphone is 10 feet, with the additional mini ultrasonic speaker being used towards the threat from a different angle, creating a stronger virtual wall of ultra-sonic suppression.

Specifications – PBN-MSK

Overall dimensions 170 х 95 х 31 mm (6.7 x 3.7 x 1.2 in)
Weight (without adapter) 0.3 kg (10.6 lb)
Battery capacity 3600 mAh (3 х 1200 mAh)
External source of power supply 12 V, 110/220V mains
Sound pressure level at 1 m (3.28 ft) Up to 120 dB
Effective range
  • optimal — up to 2 m (7 ft);
  • maximal — up to 7 m (23 ft)
Jamming method Ultrasonic interference + acoustic white noise interference
Remote control action range up to 10 m (33 ft)
Charge indication stages 4 (green LED: lit, flashes once per second, flashes 2 times per second, not lit)

The MSK ideal for any individual or organization that needs to conduct confidential discussions and protect the discussion from information leakage:

The MSK has been supplied to many types of organizations, below is a brief of common user groups of the Microphone Suppression kit (PBN-MSK)

Fortune 500 and INC 5000 companies are regularly using these systems to protect commercial interests.

Government agencies and Financial institutions have been using these systems on a mandatory basis for privacy rooms for many years.

Many different types of businesses and organizations use Ultrasonic emission to protect discussions from unauthorized eaves dropping devices.

Legal Offices

Legal offices are a common target for unauthorized recording devices.

The ability to record a confidential discussion within a legal office can cause grave consequences for all parties.

This added protection inside meeting rooms ensures your client’s privacy and your firm’s reputation are protected against information leakage threats.

TSCM Operatives

Tactical Surveillance operatives normally perform digital sweeps of meeting rooms for clients.

The need to protect the meeting room whilst the meeting is in progress is a much greater threat now.

The ability to walk into any meeting with some form of microphone is clearly easier to do and much more of a threat than someone planting a recording device in an office or meeting room beforehand.

Security Consultants and Investigators

Security consultants and Private Investigators are often provided with extremely sensitive information. Becoming a confidant to clients is a big part of the work.

Providing the extra layers of protection and demonstrating an understanding of a confidants position by using these systems will give clients peace of mind and further enhance an agencies professional awareness.

Meeting and Exhibition Organizations

Corporations who host commerce events can provide peace of mind to exhibitors and visitors with enhanced protection in meeting and conference rooms.

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