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Audio Suppressor Universal

$895.00

PBN-ASU Audio Suppressor Universal

Key Features:

  • Targeted Audio Suppression:
    Reduces the effectiveness of smartphone microphones in close proximity, limiting the ability to capture intelligible speech.
  • Maintains Device Functionality:
    Phones remain fully operational, with calls, messages, and applications continuing as normal.
  • Controlled Acoustic Environment:
    Creates a localized suppression zone around the device, addressing microphone-based recording without signal interference.
  • Immediate Operation:
    No setup, pairing, or configuration required. Position the device and it operates automatically.
  • Cross-Platform Compatibility:
    Works with iPhone and Android smartphones across standard recording and video applications.
  • Discreet Deployment:
    Designed for use in professional environments where privacy is required without disrupting workflow or communication.

Practical Privacy Control:
Designed for environments where devices cannot be removed, the PBN-ASU provides a practical method of reducing recording risk while maintaining normal operational use.

For ordering above 2 units, please request a quote.
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25 YEARS IN BUSINESS

Trusted by Hundreds of clients domestically and internationally.

NO MINIMUM ORDER

What you need when you need it.

US BASED SUPPORT

Support hours:

Monday to Friday
9AM-5PM MST

SAME DAY SHIPPING IN NORTH AMERICA

Orders received by 1PM MST go out the same day for all US clients.

All Orders ship from our Head Office location in Mesquite, Nevada

MAP PRICING

PBN-TEC adopt a strict MAP pricing policy

PBN-ASU Audio Suppressor Universal

The PBN-ASU Audio Suppressor Universal is a professional privacy control solution designed to reduce the risk of smartphone audio recording in sensitive environments.

Smartphones are now a constant presence in meetings, consultations, and operational settings. With built-in microphones and recording capability across standard applications, they introduce a persistent and often unmanaged exposure point during confidential discussions.

Traditional controls, such as removing devices or using signal-blocking solutions, can be effective but are often impractical in real-world environments where communication must remain active.

A Controlled Alternative

The PBN-ASU is designed to address the primary vulnerability – smartphone microphone recording – without interrupting normal device use.

Rather than blocking signals, the system creates a controlled acoustic environment around the device. This reduces the ability of nearby smartphones to capture intelligible speech while allowing calls, messages, and applications to function as normal.

This approach enables organisations to maintain operational continuity while introducing a practical layer of privacy protection.

Core Function

The PBN-ASU reduces the effectiveness of smartphone microphones within its operating zone.

When a device is positioned correctly, the system limits the clarity and usability of captured audio across standard recording and video applications. This applies regardless of the application in use, as all rely on the same microphone input pathway.

The system operates by introducing controlled acoustic interference within the immediate vicinity of the device, affecting how microphones capture speech.

At the same time, normal device functionality remains unaffected. Calls, notifications, and applications continue to operate without disruption.

Designed for Professional Environments

The PBN-ASU is suited to environments where confidentiality is required but device access cannot be restricted.

This includes:

– Executive and board-level meetings
– Legal and advisory consultations
– Research and development environments
– Government and secure operational settings

In these scenarios, the ability to maintain communication while reducing recording risk is critical.

Practical Security Without Disruption

Signal-blocking solutions isolate devices completely, removing connectivity and limiting usability.

The PBN-ASU provides a more practical approach by addressing how recordings actually occur—through the smartphone microphone—while allowing devices to remain active and accessible.

This enables organisations to apply a layer of control without disrupting workflow or communication.

Usage Guidance

For effective operation, the smartphone should be placed within the intended operating zone of the device and left in position during use.

Brief interaction, such as checking notifications or viewing messages, is acceptable. However, continuous handling or extended use within close proximity is not recommended while the system is active.

Maintaining correct positioning ensures consistent performance throughout the session.

Simple by Design

The PBN-ASU is designed for immediate use in professional environments.

There is no setup, no configuration, and no reliance on software or user input. Once positioned correctly, the system operates automatically, allowing it to be integrated into existing workflows without training or disruption.

User Groups & Pro-Tips

User Groups

Corporate Security & Executive Teams
Enables structured control of personal devices during sensitive discussions without removing usability. Aligns with boardroom protocols and compliance-led environments.

Legal, Investigations & Advisory
Supports interviews, consultations, and case discussions where devices remain present but audio capture must be managed consistently.

Government & Regulated Environments
Suitable for controlled rooms where device handling policies are enforced. Provides a practical alternative to full device isolation workflows.

Security Consultants & Integrators
Integrates into room procedures as a repeatable, proximity-based control that does not rely on complex setup or user training.

Pro Tips (Operational Use)

Proximity Drives Outcome
Effectiveness increases as the device approaches the unit. Best performance is achieved when phones are placed on the desk, near the ASU.

Control the Placement
Define a simple rule: devices remain within the working area of the unit during discussions. This replaces “remove the phone” with “place the phone here.”

Desk-Level Deployment
This is a point-of-capture control, not a room-wide system. Position on the table where devices naturally sit.

Always-On in Controlled Rooms
Keep units powered in spaces used for sensitive conversations to remove reliance on manual activation.

Scale with Table Size
Extend coverage by adding units so all participants remain within proximity.

Deployment Scenarios

Boardrooms & Meeting Tables
Units placed centrally (or distributed across larger tables) where phones are typically set down.

Interviews & Consultations
Position between participants to manage device-based recording risk without interrupting workflow.

Controlled Secure Rooms
Supports policies that allow device presence under defined placement conditions, offering a workable alternative to Faraday-only procedures.

Temporary Environments
Deploy in hotels, project rooms, or rented spaces where permanent controls are not available.

Built for Current Device Behaviour

Designed for modern smartphones with multiple microphones and audio processing features.
Performance is achieved at the device, where recording occurs, rather than relying on broader environmental effects.

Use Principle

Keep devices within proximity of the unit to maintain control of audio capture.

Threat Landscape

The Rise of Audio Recording and a Practical Corporate Response

The risk around sensitive conversations has not increased because intent has changed. It has increased because recording is now built into every device in the room. Smartphones have removed friction entirely. What used to require effort and planning is now passive, immediate, and often unnoticed.

That is why boardroom discussions, executive conversations, and internal meetings are now routinely exposed to recording risk simply through the presence of personal devices. Phones placed casually on a table, whether actively used or not, are fully capable of capturing clear, structured audio without drawing attention.

This becomes critical in high value scenarios such as mergers, acquisitions, financial negotiations, and investor discussions, where a single captured conversation can expose strategy, positioning, and decision making. The same applies to contract negotiations, where tone and language, once transient, can now be preserved and reused.

Internally, the shift is equally important. HR meetings, disciplinary discussions, and internal briefings now take place in environments where participants may record, intentionally or otherwise. The ability to capture and retain conversations changes how information flows, how decisions are challenged, and how organisations maintain control over sensitive dialogue.

In professional contexts, legal consultations, investigative interviews, mediation sessions, and advisory work all face the same exposure. These are environments where detail matters, and where a recorded conversation can extend far beyond its original purpose.

The challenge becomes more complex when external parties are involved. Consultants, journalists, investigators, or opposing stakeholders may all be legitimate participants, yet their devices introduce independent recording channels that sit outside organisational control. Once captured, that information is no longer governed by internal procedures or expectations.

For organisations handling intellectual property, product development, or sensitive operational processes, the implications are broader still. Discussions that were once contained within a room can now be converted into portable records, whether through deliberate action or simple convenience.

Environment amplifies the issue. In shared offices, co working spaces, hotel meeting rooms, and temporary locations, traditional controls are often absent or impractical. Conversations still take place, but the ability to manage device behaviour is reduced, increasing exposure.

Even indirect capture presents a risk. Video recordings that include audio, whether intentional or incidental, can preserve full conversations. Modern smartphones, equipped with multi microphone arrays and advanced audio processing, are highly effective at capturing speech even when not obviously positioned for recording.

Across all of these scenarios, the pattern is consistent. The rise in audio exposure is not driven by advanced surveillance tools. It is driven by normal behaviour combined with powerful, always present devices.

Recording is now ambient. It sits in every meeting, on every table, in every pocket.

That is the shift.

And it means that any sensitive discussion conducted in the presence of personal devices carries an inherent risk, not because of intent, but because of capability.

A Corporate Approach to Managing the Risk

What has become clear across all of these scenarios is that policy alone is no longer sufficient. Asking participants to turn off devices, place them away, or follow guidelines introduces friction and often leads to inconsistent compliance.

The PBN ASU addresses this in a way that aligns with how organisations actually operate.

Instead of removing devices, it introduces a controlled, proximity based approach to managing audio capture at the point where it occurs. Phones remain present, usable, and visible, but when positioned within the working area of the unit, their ability to capture usable audio is effectively neutralised.

This shift is important from a corporate standpoint.

It replaces restrictive or disruptive processes with a structured, visible control that integrates naturally into the meeting environment. Rather than relying on trust or enforcement alone, it provides a consistent, repeatable method of reducing recording risk without altering how people work.

In boardrooms, this means devices can remain on the table, within a defined area, without introducing the same level of exposure. In interviews or consultations, it allows conversations to proceed without interruption while still maintaining control over how information is captured. In controlled environments, it offers a practical alternative to full device isolation workflows, particularly where usability must be preserved.

The approach is straightforward:

  • Control placement, not behaviour
  • Manage proximity, not presence
  • Address the point of capture, not the entire environment

This makes it inherently more aligned with corporate use. It is not dependent on technical expertise, and it does not require participants to change how they interact with their devices beyond where they place them during a discussion.

A Practical Standard for Modern Conversations

As recording capability has become ambient, present in every meeting, on every table, in every pocket, organisations are moving toward solutions that reflect that reality.

The PBN ASU fits into this shift by providing a clear, controlled, and operationally practical way to manage audio exposure, particularly in environments where devices cannot realistically be removed.

It does not attempt to control the entire room.
It focuses on what matters: the device, the proximity, and the moment of capture.

And in doing so, it aligns with the expectations of modern corporate environments, where usability, consistency, and control must exist together.

In environments where phones remain present, controlling audio capture is no longer optional, it is procedural.

Requirements & FAQ

Modern smartphones are now capable of high quality audio recording at any time, often without clear indication.
In environments where sensitive discussions take place, this creates a consistent and often unmanaged risk.
The Audio Suppressor Universal (PBN-ASU) is designed to control audio capture at the point of the device.
It allows smartphones to remain present while preventing usable recordings when placed inside the Audio Suppressor Universal.
Compatible with all Modern Smartphones
Smartphone dimensions have stabilised across the flagship market.
While designs continue to evolve, overall device size now falls within a consistent range, supporting long term use of the PBN-ASU against modern devices.
The table below presents a controlled sample of tested smartphones.

It outlines device dimensions, confirms compatibility, and reports microphone protection performance under proximity based conditions.

BrandModelDevice Dimensions (L × W)Microphone Protection ResultCompatibility
AppleiPhone 17 Pro Max160.8 × 78.1 mm100%✔ Compatible
SamsungGalaxy S25 Ultra162.3 × 79 mm100%✔ Compatible
SamsungGalaxy Z Fold7 (Folded)155.1 × 67.1 mm100%✔ Compatible
GooglePixel 9 Pro162.7 × 76.6 mm100%✔ Compatible
HuaweiPura 80 Ultra162.6 × 75.4 mm100%✔ Compatible
Xiaomi15 Ultra161.4 × 75.3 mm100%✔ Compatible

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