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AAT-007-NH
    Publish time 2020-08-18 20:37    

High Power Hidden Voice Recording Jammer


The “Concealed” Recording Shield is a highly integrated high-tech security product developed by AL ASAR TECH. When a criminal uses a recording device (such as a mobile phone, voice recorder, recorder, etc.) to record you, the recording mask produces a random noise signal that can suppress the interference of the voice signal, so that the recording device can only pick up Noise information, and can not distinguish voice information, thus ensuring the security of voice information.

Application: leading offices, secret meeting rooms, military war rooms, business negotiation rooms, etc.

Item

performance parameter

Shielding type

Mobile phones, recording pens and other sound acquisition devices

Shielding distance

>2.5m (shielding distance of different recording equipment is different)

Function angle

>120 degree

Opening mode

remote control

Remote control distance

>10m

Battery Capacity

8000mah/12v

size

283*133*157mm

weight

1.5kg

ambient temperature

-40℃~55℃

relative humidity

35~85%

The power adapter

AC 100V~240V DC 12v 5A 

Packing instructions

Protective box


Instructions for use

powered by

This product uses two power supply modes: power adapter and battery.

1. When the adapter is powered. Simply plug the power adapter into the power and charging ports of Figure 2.

2. This product has 8000Mha battery, which is used to power the battery without power adapter.

use

After checking the product, check the package first: one host; one remote control; one power adapter

1. Turn on the power switch of Figure 2, the power indicator lights up, and the machine enters the standby state;

2. Press the unlock button of the remote control to turn on the machine, press the lock button of the remote control to turn off the machine and enter the standby state.

3. Turn off the power switch in Figure 2 and disconnect the power from the machine.

Note: The built-in large-capacity battery has a working time of more than 19 hours. It is recommended to use the battery if it has electricity.


As shown in Figure 1, the transmitter is at the front of the machine. For best shielding, adjust the position and angle according to the actual situation. For details, see Figure 3. As shown in Figure 3, for general recording equipment, the cutoff distance of this product is about 1.5 meters, and the cutoff angle is about 90 degrees. The distance and angle may vary for different recording devices. Some models have a distance greater than 2 meters and an angle greater than 120 degrees, but a few models may have a distance of less than 1 meter and an angle of less than 60 degrees.

The higher the end of the general model, the better the effect. When using, please try to make the distance between the transmitter's transmitting end and the recording device within 1.5 meters. The angle (mainly the MIC port) is within 45 degrees. The closer the distance is, the smaller the angle is, the better the cutting effect is.

Please note that the above data is obtained without any barrier between the transmitter and the recording device (such as clothes, body, etc.). In the case of blocking, the cutting distance will be shortened.

Functional characteristics
1. Mixed-frequency interference mode
This product is the first time in the industry to adopt mixing noise interference mode, which is different from the electromagnetic interference mode used by traditional recording interference equipment, so as to avoid electromagnetic radiation to the people near the equipment when the recording interference equipment works.

2. Sound cannot be restored
This product is processed by the most seed of true random number. After processing, the human voice signal and the random interference signal of the equipment are mixed together, and can not be restored by technical means.

3. Wide coverage
Compared with the traditional recording shielding equipment, the interference distance of this product to the mainstream recording equipment can be more than 2.5 meters, and the interference angle is more than 90 degrees.

4. Simple, Easy to Use and Flexible
This product is stable, reliable, highly product-oriented, simple and easy to use.

Product Function and Working Principle
1. Basic Functions
During the working process of the recording shield, random interference signals will be generated, which can ensure that the original voice information can not be recovered from the recording signal. The interference signal interferes with the recording equipment without harming the human body. When the interference signal is picked up by the recording device, it will cause only a buzzing noise in the recording signal and can not distinguish the normal sound signal, so as to achieve the purpose of protecting the voice information.

2. Working Principle
In the working process of the recording shielder, the true random number is the most seed, and the high-security encryption algorithm is used to encrypt the random number. Then the encrypted random number is processed by mixing the high-frequency and low-frequency sound sources. The interference signal with unrecoverable, silent and overlapping effect is generated, which interferes with the sound acquisition equipment, thus forming the effect of sound shielding.
Product advantage

1. Basic Product Status
In the field of recording shielding equipment, there is only one device known to people. The recording shielding equipment is mainly aimed at obsolete tape recorders and very few types of recording pens. For the current mainstream recording equipment, mobile phones, digital recording pens and so on have no effect or very poor effect.
For this reason, relying on the information security technology accumulated over the years, our company independently developed the recording shield products to meet the shielding function of mainstream recording devices such as mobile phones, digital recording pens and so on, so as to protect the conversation content security of users.

2. Defects of traditional technology schemes
The traditional recording shielding technology mainly uses the random pulse sequence in a wide frequency range to interfere with the recording equipment. High-power and high-frequency signals produce electromagnetic interference to the recording equipment, which makes the input voltage or current of the front end of the acoustic sensor exceed the threshold of the acoustic sensor, so that it can not work normally and achieve effective voice blocking. This method has no noise, but its main disadvantage is that it can only interfere with analog recording equipment better, and the new digital recording equipment is basically ineffective. At the same time, high-power radio electromagnetic signal will produce electromagnetic radiation, which is harmful to human body when used for a long time.

3. Product Competitive Advantage
3.1. Supporting the shielding of various mainstream recording devices.
3.2. In the working range of the shield, the original voice information can not be heard from the recorded information by recording equipment.
3.3. Within the scope of the shield, the original voice information can not be restored from the recorded information by recording equipment.
3.4. The recording shield does not emit audible sound during the working process.

System constraints and constraints
Specific descriptions that this product does not support in some scenarios will be described here.
(1) Equipment type constraints
The device supports the shielding of various mainstream recording devices, including mobile phones, recording pens, wireless/wired, wireless recording devices, microphones, etc. However, due to the constant innovation of mobile phone models, different brands, different periods and different levels of mobile phone voice processing parts are different, so the recording shielding effect of a few types of mobile phones is relatively poor.

(2) Coverage constraints
Limited by the technical principles adopted, the effective shielding distance of the products is generally 2.5-3m, the effective shielding angle is about >120°, and there will be some differences for different recording devices.