Description of the article « ANGEL 12 PRO Ultrasonic Microphone Jammer »
ANGEL 12 PRO: ultrasonic jamming for sensitive conversations
A business discussion, client file or internal decision should remain within the intended audience. ANGEL 12 PRO is the 55-transducer model for users who can prepare a conversation area and control the placement of the equipment.
The ANGEL 12 PRO ultrasonic microphone jammer aims to disrupt speech capture by microphones susceptible to this technique. Its desktop format can be placed in meeting spaces to complement confidentiality procedures.
55 transducers and 270°: orient the unit for your meeting
The stated 270° angle covers a broad sector around the unit. Take the remaining sector into account and position the equipment around participants and possible microphone locations. This model suits settings where the layout can be prepared before the discussion.
The ultrasonic signals are intended to interfere with the audio capture chain of susceptible microphones and reduce the intelligibility of recorded speech. The result depends on the equipment exposed and cannot be inferred from transducer count alone.
Sound activation: jamming follows the conversation
All three ANGEL 12 models feature a sound activation mode. When enabled, the unit can pause jamming emission during silence, then restart automatically when it detects sound or a voice. This avoids manually operating the controls whenever discussion resumes.
Check its behaviour in the intended room, as ambient noise can affect triggering. The pause concerns the jamming emission: the device remains able to detect the return of sound. It is not a guarantee that every syllable will be masked in all conditions.
3D configuration: three linked and synchronised ANGEL 12 PRO units
The 3D version includes three ANGEL 12 PRO units, linked and synchronised with each other. Each retains the specifications of the selected model. Together they provide 165 transducers distributed across three units, allowing different emission positions around the conversation area.
This configuration is particularly recommended for latest-generation recorders using advanced functions, multiple microphones and noise reduction processing. Distributing the units varies the directions of exposure to the jamming, according to room geometry and the possible positions of recording devices.
Linking and synchronisation coordinate the three units. Range is not automatically multiplied by three, and the name 3D does not mean there can be no ineffective areas. Prepare the layout with a representative recording test.
Battery operation and use while charging
ANGEL 12 PRO can operate while charging with the appropriate power supply, allowing a meeting to continue when a suitable socket is available. Battery operation supports temporary installations and moving between rooms.
The reference manual states up to 2 hours 30 minutes of battery operation and around 3 hours to recharge. Actual duration varies with settings and conditions. In 3D, prepare the charge and power supply of all three units; their number does not turn that figure into a combined sequential battery life.
Two power levels and desktop controls
High and low settings let you adapt operation to the surroundings. Buttons and the remote control provide access to functions, while the display indicates battery level and sound activation status. Night mode reduces display brightness.
The stated maximum range is up to 8 m, depending on conditions. A table, screen, garment or other obstacle can affect ultrasound propagation. The jammer does not detect hidden microphones, and switching it on does not itself confirm that recording is impossible.
Interpreting the additional display functions
The reference documentation describes the air-quality value as simulated rather than an actual measurement. Negative ion emission is also listed as an additional function; no measured air-cleaning or health benefit is claimed here. These functions do not assess the confidentiality of a meeting.
Practical advice for installation
- Prepare the power. Check the charge before the meeting and use the appropriate supply if it runs longer.
- Keep emitting faces clear. Place the unit outside any bag and avoid objects that obstruct emission.
- Plan the placement. Allow for the sector outside the stated 270° and orient the emitting area towards the conversation.
- Check sound activation. Test its response to a voice and to background noise.
- Distribute all three units in 3D. Set up linking and synchronisation according to the supplied instructions.
- Make a sample recording. Listen to recordings from your own devices at the intended positions and retest after changing the layout.
Compare formats in our ultrasonic jammers and Faraday bags selection.
Strengths and limitations
| Strengths | Limitations to consider |
|---|---|
| 55-transducer configuration for a planned conversation area | The sector outside the stated 270° angle needs to be taken into account. |
| Sound activation with pauses in silence and automatic restart | Background noise may affect triggering. |
| Use while charging | An appropriate power supply and clear emitting faces are still needed. |
| 3D: three linked and synchronised units | Allow for installation, linking and charging of all three units. |
| 3D configuration recommended for advanced multi-microphone recorders | Results vary with devices, obstacles and audio processing. |
| Desktop format with power adjustment | A slight operating noise may be perceptible. |
Frequently asked questions
What is the difference between Standard and 3D for ANGEL 12 PRO?
Standard includes one ANGEL 12 PRO unit. The 3D configuration includes three units of the same model, linked and synchronised with each other. It lets you distribute jamming sources around the conversation area. Placement and recording tests remain necessary.
How many transducers does ANGEL 12 PRO have?
The Standard model has 55 transducers and a stated 270° angle. The 3D configuration combines three identical units, totalling 165 transducers. This does not automatically multiply the range.
Why consider 3D for recent recorders?
The 3D configuration is particularly recommended for recent recorders combining advanced functions, several microphones and noise reduction. Three linked, synchronised units provide different emission positions. Effectiveness still depends on the target device, its audio processing and placement.
How does sound activation work?
When this mode is enabled, jamming can pause during silence and resume automatically when a sound or voice is detected. It controls the jamming emission automatically; ambient noise may also affect triggering.
Can I use the jammer while it is charging?
Yes. Operation while charging is possible with the appropriate power supply. Keep the emitting faces clear and follow the instructions.
What range can I expect?
The stated maximum range in the reference manual is 8 metres. Useful distance varies with the microphone, its orientation, obstacles and the surroundings. Neither the stated angle nor the 3D configuration guarantees a completely protected area.
Is the jammer completely silent?
The instructions indicate that a slight noise may be perceptible during operation. Ultrasound must therefore not be presented as a guarantee of absolute silence.
Is the result guaranteed on every phone?
No. Results vary with microphones, audio processing and device placement. Test your own equipment in the intended conditions before a sensitive discussion.
Specifications of the article « ANGEL 12 PRO Ultrasonic Microphone Jammer »
- Commercial range: ANGEL
- Model: ANGEL 12 PRO
- Transducers per unit: 55
- Stated jamming angle: 270°
- Technology: Ultrasonic jamming with mixed frequencies and dynamic adjustment
- Stated maximum range: Up to 8 m, depending on conditions
- Sound activation: Jamming pauses during silence and resumes automatically when sound or voice is detected
- Use while charging: Yes
- Power levels: High and low
- Controls: Buttons, remote control and sound activation
- Stated battery capacity: 13,000 mAh per unit
- Stated battery life: Up to 2 hours 30 minutes per unit, depending on use
- Stated charging time: Around 3 hours
- Charging supply: 21 V / 1 A, appropriate charger
- Display: Battery level from 0 to 100, power and sound activation status
- Night mode: Reduced display brightness
- Housing: ABS and steel
- Stated dimensions per unit: 215 × 120 × 120 mm
- Stated net weight per unit: 1,300 g
- Target devices: Phones, dictation recorders, audio recorders and microphones in video equipment
- Standard version: 1 unit
- 3D version: 3 units of the selected model, linked and synchronised
- 3D application: Recent recorders with advanced functions, several microphones and noise reduction
- Total transducers in 3D: 165 (55 per unit)
- Air-quality display: Simulated value, not an actual measurement
- Additional stated function: Negative ion emission
