Acoustic Security Frequently Asked Questions

The HARP Speech Protector is a counter-surveillance device that protects confidential conversations from unauthorized recording. Used in over 70 countries by governments, military units, diplomats, and high-security organizations, the HARP uses patented technology to disrupt microphones in its vicinity, preventing smartphones, hidden recorders, and other listening devices from capturing speech.

The HARP offers two distinct protection modes: Discreet Mode (barely audible) to affect the majority of microphones and Voice-Mix Mode (audible personalized noise) to prevent eavesdropping and advance forensic audio cleaning. See “What is the difference between Discreet Mode and Voice-Mix Mode?” below for details on each mode.

The VAULT Mobile Speech Protector extends this protection to on-the-go scenarios, offering Voice-Mix Mode in a compact form factor to prevent smartphone interception or eavesdropping.

The HARP Speech Protector typically uses an external power cord and needs to be plugged into an electrical outlet. However, it can also operate on an external lithium rechargeable battery, making it portable and suitable for various settings. The HARP can also be connected to a vehicle cigarette lighter for in-car use. You can purchase a lithium rechargeable battery separately from our Accessories page to enable battery operation.

The HARP Speech Protector in operation with the 12V 8A Lithium Polymer Battery Packs, offers a charge that varies depending on usage and settings. Discreet Mode: approximately 3 hours. Voice-Mix Mode: up to 30 hours, depending on volume level. Music Streaming: up to 30 hours. Combined use (Discreet + Voice-Mix): approximately 3 hours. These are estimates; actual battery duration may vary depending on environmental conditions and usage patterns.

The Discreet Mode of the HARP Speech Protector emits ultrasonic waves that disrupt microphones within a hemispherical protection zone. This mode can cover a radius of up to 4-5 meters for most microphones, extending to many more depending on the microphone type and environment. This hemispherical coverage provided by the HARP is significantly more effective compared to other devices. Unlike unidirectional ultrasonic jammers that only disrupt microphones in a single direction or 360° jammers that cover a horizontal plane but leave gaps in other directions (no vertical coverage), the HARP ensures comprehensive protection in all directions within its coverage radius.

The VAULT is an acoustic protection device designed to prevent mobile phones from capturing nearby conversations. Compact and easy to carry, it can be used both inside and outside the office. The VAULT uses the same Voice-Mix technology as the HARP Speech Protector.

Key Differences:
Coverage: The HARP^® protects a wide hemispherical area, with a coverage radius of up to 4 to 5 meters, while the VAULT is designed for close-range protection around a single mobile device.
Protection Modes: The HARP^® includes Discreet Mode, providing an additional layer of protection. The VAULT operates exclusively in Voice-Mix Mode.
Use Case: The HARP^® is intended for boardrooms, offices, and other secure environments. The VAULT is designed for personal use while traveling, in vehicles, restaurants, or any setting where a mobile phone may pose a risk.

Both products can be used together to create layered protection. The HARP^® secures the meeting room; the VAULT secures individual mobile devices.

Similarities between the HARP Speech Protector and the VAULT:
Both use patented Voice-Mix technology.
Both are designed to protect private conversations.
Both are designed and manufactured in Canada.
Both are industrial-grade devices with no built-in microphones.

Absolutely. Click “SEE IT IN ACTION” to access a comprehensive video demonstration showing both Discreet Mode and Voice-Mix Mode in real-world scenarios. After completing a short qualification form, you will gain access to a detailed video demonstration. You may then schedule a virtual session with a Santor product specialist to review your operational requirements and validate the solution in your environment.

Discreet Mode uses ultrasonic disruption to mitigate and affect the majority of microphones and devices within its hemispherical zone. It is virtually silent to the human ear and effective against the majority of audio recording devices on the market, including smartphones and smart wearables.

Voice-Mix Mode is Santor’s patented acoustic technology that uses your own voice frequencies to create a scrambled sound barrier. When configured properly (appropriate dB level, placement, and usage), Voice-Mix Mode prevents and affects all types of microphones, including situations involving human listeners.

Discreet Mode is designed for everyday confidential meetings and general protection. Voice-Mix Mode is intended for scenarios requiring the highest level of speech protection, such as classified briefings, legal consultations, and diplomatic exchanges.

Both modes can be activated with a single button press.

The HARP’s Discreet Mode uses ultrasonic disruption technology to interfere with the vast majority of microphones, including those in smartphones, tablets, smart watches, voice recorders, and concealed recording devices. However, effectiveness can vary depending on the type and technology of the microphone. While MEMS microphones (used in most modern electronics) are highly susceptible, certain specialized or shielded microphones may show varying degrees of resistance.

For environments requiring protection against all microphone types, Voice-Mix Mode adds an additional layer by rendering captured audio unintelligible and resistant to forensic audio cleaning, even from devices not fully disrupted by ultrasonics.

For optimal performance, the device must be used in accordance with recommended operating guidelines. If you encounter a recording device not affected by Discreet Mode, Santor encourages you to share the device type and model so our engineering team can enhance algorithms in future updates.

No. The HARP contains absolutely no built-in microphones. This means the device cannot capture, store, or transmit any audio under any circumstances. At Santor, this is a non-negotiable principle. Unlike some competing solutions that integrate microphones and introduce potential vulnerabilities, the HARP ensures zero audio capture capability.

The HARP is versatile and can be installed in multiple configurations: on a table, underneath a table (using included screws), on a ceiling (similar to a smoke detector), on a drop ceiling (clipped to T-rails), on a tripod (standard 1/4-inch threads), on a wall, in a vehicle (using a 12VDC adapter, sold separately), or carried in its anti-eavesdropping protection bag for mobile use.

For a standard boardroom, we typically suggest a combination of ceiling and table-level installations. Final deployment should always be adapted to the environment, room structure, and operational requirements. Santor recommends working with a product specialist to define the optimal configuration. Included in the box: the HARP unit, 12V DC power supply, 2 mounting screws, and a Quick Guide.

The HARP Speech Protector is the only counter-surveillance speech protection system that combines hemispherical ultrasonic coverage (Discreet Mode) with Voice-Mix masking in a single device. Most competing products rely on unidirectional ultrasonic emitters that only protect one direction, or 360° horizontal jammers that leave vertical gaps, leaving significant blind spots.

Key differentiators include: a patented hemispherical coverage pattern (4-5 meter radius in Discreet Mode), dual protection modes for different scenarios, TUV-SUD safety certification, and proven deployment across 70+ countries with government and military clients. The HARP is also the only device in its category to hold a US patent for its core technology. Click “SEE IT IN ACTION” to see detailed test comparisons in our video demonstration.

The HARP is available exclusively through direct consultation with a Santor product specialist. Pricing is provided on a per-quote basis reflecting your specific requirements and volume. Click “SEE IT IN ACTION” to begin the process. After completing a short qualification form, a product specialist will follow up with personalized pricing and product details.

Yes. Whether you’re equipping a single conference room or deploying across an enterprise campus, our team will provide a quotation that reflects your specific requirements. Click “SEE IT IN ACTION” to get started. After a short qualification form, a product specialist will follow up with volume-based pricing tailored to your deployment.

Due to the nature of our counter-surveillance technology, Santor does not ship trial or evaluation units. However, depending on your location, we may be able to connect you with an authorized reseller who can arrange a live demonstration.

For remote evaluation, click “SEE IT IN ACTION” to access a comprehensive video demonstration and speak with a Santor product specialist who can validate the solution for your environment.

Santor also exhibits at relevant trade shows worldwide. Clients are welcome to visit our booths for live demonstrations. Check the News section of our website for upcoming events.

Absolutely! At Santor, we employ a specialized team of international shipping experts to deliver the HARP Speech Protector to over 70 countries worldwide. Our global shipping ensures that wherever you are, we can get the HARP to you efficiently and securely.

The cost of shipping varies depending on the destination country, the delivery method, and the volume of the order. Shipping is calculated and confirmed when the order is finalized. For detailed shipping information, please reach out to our team.

Orders are typically ready to ship within 3 to 5 business days after payment confirmation. The customer is responsible for any additional import duties and charges based on the shipping destination. We recommend employing a customs broker to manage clearance at the destination country to avoid the risk of returns from non-compliance with local customs regulations.

The purchase process begins by requesting a quote. Click “SEE IT IN ACTION” on the HARP Speech Protector page. Once your quote is approved, you will receive the Terms and Conditions to sign, followed by a formal purchase agreement. Payment is completed via wire transfer, and your order ships upon payment confirmation. For questions about the process, Contact Us directly.

The HARP Speech Protector incorporates proprietary and patented counter-surveillance technology. Acceptance of our Terms and Conditions is required before we share detailed technical specifications, pricing, and operational documentation. This protects the integrity of the technology and the security of our clients worldwide. The Terms and Conditions are a standard part of our qualification process and are presented after you complete the “SEE IT IN ACTION” form.

Keeping your HARP system up to date is simple. You can access the latest system updates through the SANTOR Connect mobile app. You will receive email notifications whenever a new update is released to ensure your device remains current with the latest security enhancements and new features.

Yes. After you purchase one of our HARP devices, one of our product specialists will contact you to schedule an online training session. This session will help you fully understand and utilize the device’s features and capabilities. Clients also benefit from one year of complimentary virtual support after purchasing the HARP. We also provide a detailed product manual and instructional videos for additional support. For any further questions or assistance, our dedicated support team is available via chat and email.

The HARP measures 8.15 × 8.15 × 3.39 inches (20.7 × 20.7 × 8.6 cm) and weighs 2.87 lbs (1.3 kg). It is powered by a 12V DC power supply (included) and features a frequency response ranging from 23 kHz to 27 kHz in Discreet Mode. The unit has an operating temperature range of 32°F to 104°F (0°C to 40°C). Additional specifications and configurations can be discussed with a product specialist.

The HARP Speech Protector has been tested and certified by TÜV SÜD, a globally recognized certification body, confirming compliance with applicable safety, electromagnetic, and environmental standards. This includes FCC (United States), CE (European Union), IC (Canada), and other relevant certifications.

The HARP Speech Protector is designed as a defensive, non-transmitting audio protection device. It does not intercept, record, or transmit any communications. It is used solely to prevent unauthorized recording of private conversations, meetings, and presentations. It holds international certifications (FCC, CE, IC, and others) confirming regulatory compliance. However, regulations vary by jurisdiction. We recommend consulting with your legal team regarding local laws on counter-surveillance devices. Santor Security can provide compliance documentation upon request.

Santor Security works with an international network of authorized resellers and distributors. If you are interested in representing the HARP in your country, visit our Reseller page or contact our sales team directly. We provide comprehensive training, marketing materials, and dedicated support for our channel partners.