This Professional voice recorder microphone jammer blocker was made to make sure that any rooms or places where important conversations are taking place are fully covered against any possible intrusion from prying ears, or from any electronic spy item such as long-range microphones or eavesdropping devices.
It works by jamming the listening devices' transmission, by sending an ultrasonic
signal in the airwaves. While this signal is not audible for the human ear, it effectively produces a noise
that makes it impossible for any digital or tape recorder, wireless or wired microphone, or even mobile phones,
to hear or record any conversation. The device is equipped with a photoelectric cell, and can be connected with
ultrasonic speakers using the built-in jack.
How it is made and how it works
The casing is very sturdy and made with ABS plastic that can withstand heavy impacts.
Main parts and features can be seen in the figure below:
A micro controller with a built-in software is used to control the device remotely Its
photoelectric cells generate a series of high frequency waves, whose patterns are controlled by the controller's
software, inaudible for the human ear but equivalent to 120 dB for any listening device. On top of that, the system
generates a signal that replicates the human speech, but with meaningless gibberish sounds.
You can use either the installed batteries or a battery charger (included) as a power supply to operate the device.
The charger can be used both to charge batteries and to power the device.
We recommend making sure that the device's transducers are pointed in the direction
where any microphone, recorder or listening device could be placed, for example in the direction of guests who
might be wearing "bugs" under their clothes.
The recommended distance from any listening device should be up to
a maximum of 2 meters. Just turn the device on, and it will start generating its signal similar to human speech;
adjust the signal volume, and make sure that the conversation is carried out in a manner that allows you to hear
everyone in the room talking, without having to repeat or raise anyone's voice.
Angle of the ultrasonic emission
The angle of the ultrasonic emission is 15 degrees from the emission point, with respect to the vertical, the effective radiation emission diagram is 30 degrees. The radiation is stronger near the vertical. The diagram changes continuously, like the emission.
Battery life of the Microphone Suppression Kit with speaker connected
The battery life has 4 hours autonomy in Turbo mode (the loudest mode) - The speakers have their own power supply.
Differences between silent mode and audible mode
Silent mode specifically protects against the most common threat such as digital microphones, and uses only the Silent Ultrasonic signal. Audible mode is instead indicated for threats from analog and laser microphones; in this mode both the ultrasonic signal and the audible white noise are used.
Ultrasonic transducers: Up to 3.3 meters of silent protection
Outdoor speaker jack: Connect an acoustic speaker for additional noise with tones similar to human voice
Turbo mode: To exploit the maximum power of ultrasound
Power / volume knob: Switch between silent and audible modes
External ultrasonic loudspeaker jack: For a higher level of protection
Ultrasonic transducers on the upper panel: To raise a virtual wall between you and the recording device
External ultrasonic speaker: Up to 2 additional speakers
During business meetings, informal exchange of information in unsafe places.
For protection from hidden bugs and microphones to inhibit listening and possible recording of appointments and interviews.
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