Microphone Suppression Kit

Microphone Suppression Kit
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Microphone Suppression Kit

Microphone Suppression Kit

  • Prevent unauthorized audio recordings in meeting rooms and offices
  • Specifically built for Russian Security Services – KGB
  • 2 Ultrasonic Speakers for multi directional protection from audio microphones
  • Two technologies onboard, ultra-sonic emission (silent) & White Noise Acoustic Interference
  • Protect rooms up to 10 ft long and 6 ft wide using 1 system
  • Provides live protection that no TSCM sweep can ever detect, threats present at the meeting
  • 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 wiretapping.

The microphone suppression kit uses silent ultrasonic waves and is able to 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. Particularly useful in vehicles due to the Ultrasonic emission bouncing across a small space, creating stronger ultra-sonic suppression.

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

Maximum protection is guaranteed by an ultrasonic signal generated on the basis of a proprietary copyrighted algorithm.

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 feature is not recommended for covert requirements.)

The most common threat is certainly represented by digital microphones; in cases of a laser microphone or an analog microphone, the additional acoustic silencer, which reproduces disturbances over the entire spectrum of audio vocal frequencies, is essential to obtain maximum protection against all types of microphones; digital, analog, and laser.

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 cellphones, 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 mini ultrasonic loudspeaker must instead be positioned closer to the target, at a distance of 3.2, and oriented laterally to the target itself in order to create a virtual suppression wall against the microphones and prevent any unwanted recording or remote listening.

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.


Who uses the Microphone Suppression Kit

Who needs this type of Speech Protection?

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 these systems. Below we have compiled a summary of user groups who can benefit highly from this type of protection.

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 firms reputation are on the right track.

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.


Q: Can this system defeat all types of Microphones?

A: Yes, if using silent ultra-sonic emission, the device can suppress audio on all types of digital audio recorders – Most common type of audio recorders are all digital. For Analog audio recorder suppression, we recommend using both the silent ultra-sonic emission and white noise to defeat analog audio recorders.


Q: I need to protect my office when I have sensitive discussions with my clients, will this work?

A: For a typical office environment where a desk separates the visitor from the host and each person is facing toward each other, one MSK system will be enough to distort any unauthorized recordings which may be taking place.


Q: I need this system but I need it for multiple locations when I am travelling and meeting clients. This speaker seems too big. Is there a small portable system?

A: MSK is designed for use inside and outside of offices. So meetings in cars or public spaces, using the main suppressor in such environments can help protect confidential discussions. The small main unit can work for 5 hours on one full charge. You can also power the device by mains for continual protection.


Q: How long does the battery last on this Speaker?

A: 5 hours battery once the device is fully charged for approximately 4.5 hours.


Q: Will this work without anyone knowing it is being used?

A: You can operate this device in Silent Ultrasonic emission mode if you need to use this system covertly.

2 Reviews

  • Silent Audio Recording Jamming at it's best!

    Posted by Paul Colby Jr on 15th Jul 2021

    Incredible how nobody can record my private conversations ever again. High quality and buying another set for my brother.

  • I feel safe to talk again - incredible product!

    Posted by Al Jamison on 15th Jul 2021

    Finally a solution for my Car to talk to my Business Partners. This thing is incredible. Thanks SpyAssociates, you guys Rock!!!

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Shipping & Returns

Audio devices may not be used to violate the privacy rights of others. In no way will Spy Associates or its subsidiaries or partners be held responsible for inappropriate use of these products.

FREE Ground Shipping On All Items Over $199

Receive free ground shipping on all items we carry. Depending on your location, carrier may vary depending on maximizing delivery speed to your location.

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Your Order will be given to the shipping carrier the same day you place the order, not including national holidays & weekends. Shipping days do NOT include weekends UNLESS you order SATURDAY DELIVERY at checkout. Any order placed after 2pm weekdays or on Saturday / Sunday will be shipped out the next business day.

Some custom built products may require up to 48 hours, which includes custom audio add-ons that may require 72 hours. You will be notified of any delays as soon as possible.

International Shipping & Customs

YES! We ship worldwide. On International Orders, any CUSTOMS FEES are the responsibility of the purchaser NOT SpyAssociates. Every country's import rules are different, so it's impossible to guess how much, and if any fees may apply.

Return Policy

We test all of our products before shipping to ensure they are in working order.

Your Satisfaction Is Our Number One Concern


All products which are special ordered by the person ordering and are NOT subject to cancellations. Due to the nature of our product line, returns will only be accepted for products damaged upon shipment to the customer*. All returns must be authorized by before product(s) is returned. will replace, refund, or credit your account for returned product(s) at's discretion. We have been forced to implement this policy because of the attraction of our products to unscrupulous people who return products after they have profitably gained from the short-term use of the products.

*Special exceptions may be made on a case by case basis determined by In this event, returns are subject to deductions for shipping costs and a 25% restocking charge and must be returned within a ten (10) day period from date of receipt of product(s). NO refunds will be given for products returned without explicit permission from

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Any return must be authorized by a representative of and under no circumstances will returns be accepted otherwise. Authorization and shipping instructions must be obtained from No returns will be authorized after ten (10) business days of receipt of product(s) by the customer, unless found to be defective, in which case we will replace at no charge once returned with authorized RMA.

We at strive to offer our customers the best products at the best possible prices. Due to the nature of the products, returns will not be accepted unless the product is found to be defective or unless otherwise explicitly stated on the specific product page.

Shipping & Handling Charges Are Non-refundable.


Every product receives FREE LIFETIME SUPPORT. We guarantee all products to be free of defects in workmanship and material for 90 days (some manufacturer's warranty is one (1) year or lifetime - please see info on the page for specific product's details) after sale to the customer. We will replace or repair the product(s) at our option providing there is no evidence of customer misuse, or alteration.

This device will only connect to 2.4 GHz Wi-Fi Networks with passwords that do not contain special characters.

We are unable to guarantee Wi-Fi connection will work with all routers. Although most networks are compatible, certain routers enact stricter security measures that may block remote connections to the camera. Some examples likely to experience these issues are hotels/motels, corporate networks, 4g hotspots, open wifi networks like Starbucks, etc. Some WIFI units require the unit to be paired with a router if the end user is wanting to look at the livestream or receive motion alerts. Only compatible with Android 6 & up, iOS 8 & up. These items will need to format the MicroSD Card before use. This is done through the app.

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