The VoidSonic Ultrasonic Microphone Blocking Box is an advanced speech protection system designed to protect sensitive conversations from unauthorized audio recording and eavesdropping. Utilizing directional ultrasonic noise emissions, the VoidSonic suppresses smartphone microphones, digital voice recorders, and hidden bugs without generating audible noise in the room. Essential equipment for TSCM specialists, executive boardrooms, legal consultations, and secure government facilities.
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VoidSonic – Ultrasonic Microphone Blocking Phone Box
325 €406 €
VoidSonic – Ultrasonic Protection Against Phone Recording
Ultimate Anti-Recording & Speech Protection System
In high-security environments, smartphones and hidden recording devices represent a major vulnerability. The VoidSonic Ultrasonic Audio Jammer provides complete peace of mind by targeting the physical diaphragm of micro-electro-mechanical systems (MEMS) microphones found in modern smartphones and dictophones.
By emitting inaudible ultrasonic interference directly inside the acoustic suppression chamber, VoidSonic saturates the target microphone, rendering any captured audio completely distorted and unintelligible—all while allowing human conversation outside the box to proceed uninterrupted.
Key Features & Technical Advantages
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Silent Ultrasonic Jamming: Emits high-frequency sound waves above the human hearing range for completely silent operation that disrupts nearby recording devices without causing distraction.
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Comprehensive Phone Coverage: Generously sized interior accommodates multiple modern smartphones simultaneously inside the targeted acoustic suppression zone.
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Zero Acoustic Leakage: Engineered acoustic enclosure prevents external sound disruption while completely overwhelming internal microphones.
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Plug-and-Play Security: Features an intuitive single-switch operation requiring no complex technical setup or daily calibration.
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TSCM Professional Grade: Designed specifically to meet the rigorous technical standards required by countersurveillance teams, security consultants, and government agency personnel.
Primary Applications & Use Cases
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Executive & Boardroom Meetings: Prevent corporate espionage and leakage during sensitive board discussions and confidential strategy sessions.
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TSCM Sweep Operations: Deploy as an essential physical hardware component within a complete counter-surveillance and technical sweep toolkit.
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Legal & Client Consultations: Safeguard privileged attorney-client discussions against unauthorized mobile phone audio recording.
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Government & Defence Facilities: Serves as a secure, active drop-box for personal mobile devices before entering classified discussion areas.
Technical Specifications
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Technology Type: Ultrasonic Acoustic Interference (MEMS Microphone Suppression)
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Interference Frequency: Ultrasonic band (Inaudible to human ear)
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Device Compatibility: iOS & Android Smartphones, Digital Dictophones, Voice Recorders
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Power Supply: AC Adapter / Rechargeable Internal Battery
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Enclosure Type: Heavy-duty acoustic suppression box
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Security Category: Speech Protector / Audio Jammer / TSCM Hardware
| Weight | 1 kg |
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How it works
Smartphone microphones are designed to capture sound across a broad range of frequencies. VoidSonic takes advantage of the way microphones and their electronic processing respond to ultrasonic signals.
The device generates ultrasonic sound that is outside the normal range of human hearing. These ultrasonic signals are directed into the area surrounding the smartphone microphones.
Through ultrasonic mixing interference, the microphone and its associated audio circuitry can be subjected to interference that makes it more difficult to obtain a clear recording of the surrounding conversation.
In simple terms, VoidSonic uses ultrasonic sound to interfere with the microphone’s ability to capture speech clearly, while remaining inaudible to the people in the room.
The technology does not depend on blocking cellular, WiFi, Bluetooth or other wireless communication signals. The phone can therefore remain connected and functional while the microphone environment is being protected.
Performance can vary depending on the smartphone model, microphone design, positioning and surrounding acoustic conditions. VoidSonic is intended as a privacy aid and should be used as part of an overall confidential meeting and information security policy.
When & Where to use VoidSonic
Designed for Confidential Conversations
VoidSonic is particularly suited to environments where sensitive information is discussed and where smartphones may otherwise be capable of capturing audio.
Business Meetings
Protect confidential discussions involving company strategy, pricing, acquisitions, product development, personnel matters and other sensitive business information.
Executive and Board Meetings
Create an additional layer of privacy during leadership meetings where highly confidential decisions and information are discussed.
Legal Consultations
Use VoidSonic during private consultations where sensitive client information, case details or legal strategy may be discussed.
Financial Discussions
Suitable for meetings involving financial information, investment decisions, transactions and other commercially sensitive matters.
Negotiations
Add an additional privacy measure during contract negotiations, partnership discussions, mergers and other high-value negotiations.
Professional Consultations
VoidSonic can be used in professional environments where conversations may contain confidential personal or business information.
Interviews and Sensitive Discussions
Useful for journalists, investigators, security professionals and organizations conducting interviews where unauthorized audio recording is a concern.
Private Personal Conversations
For individuals who want an additional layer of privacy when discussing personal, confidential or sensitive matters.
Key Benefits
Ultrasonic Microphone Protection
Designed to interfere with smartphone microphone recording through ultrasonic acoustic interference.
Completely Quiet Operation
The ultrasonic protection operates outside the normal range of human hearing, so it does not introduce audible masking noise or disruptive sounds into the surrounding environment.
Automatic Activation
The device activates automatically when a smartphone is placed on the dock.
Fast Response
The specified activation response time is less than or equal to 0.5 seconds.
Wide Compatibility
Designed for use with a broad range of smartphones.
Discreet Operation
The compact dock-style construction and inaudible operation allow the device to integrate naturally into professional meeting environments.
Portable Design
At approximately 300 grams, VoidSonic can easily be transported between meeting rooms, offices and other locations.
No Wireless Signal Blocking
The technology is based on ultrasonic acoustic interference rather than conventional cellular, WiFi or Bluetooth signal shielding.
Wireless Charging
The device supports Qi wireless charging with up to 15 W output when used with a suitable QC or PD fast charger.
Automatic Operation
VoidSonic is designed to require minimal interaction.
Place the smartphone on the dock and the device automatically activates. The specified response time is less than or equal to 0.5 seconds.
A visible working-status indicator provides a simple way to confirm that the device is operating.
There is no audible alarm, masking sound or disruptive audio during normal operation.
When the meeting is finished, simply remove the phone.
VoidSonic PDF
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