Manufacturer of recording shield, anti recording jammer, yx-007-n concealed recording shield and audio shield

This yx-007-n "concealed" recording shield is a highly integrated high-tech safety protection product independently developed by Tianjin Yingxun Technology Co., Ltd. When lawbreakers use recording equipment (such as mobile phones, recording pens, recorders, etc.) to record to you, the recording screen will generate random noise signal, which can produce suppressive interference to the voice signal, so that only the noise information picked up by the recording equipment can not distinguish the voice information, so as to ensure the safety of the voice information. Widely used in: leading office, confidential meeting room, military operation room, business negotiation room and other places to prevent recording.

Instructions
power supply
This product adopts two power supply modes: power adapter and battery.
1. When the adapter is powered. Directly insert the power adapter into the power supply and charging port in Fig. 2;
2. There is 8000mha battery in this product, which can supply power to the battery without power adapter;
Use
After receiving the product, check the package first: one host; one remote control; one power adapter
1. Turn on the power switch in Figure 2, the power indicator light will be on, and the machine will enter the standby state;
2. Press the unlocking key of the remote control to start the machine, and press the locking key of the remote control to close the machine and enter the standby mode
3. Turn off the power switch in Figure 2 and disconnect the machine.
Note: the built-in large capacity battery of this product lasts for more than 19 hours. It is recommended to use the battery as much as possible if the battery has power.
Whole truncation angle
As shown in Figure 1, the shield transmitter is in front of the machine. In order to achieve the ideal truncation effect, please adjust the position and angle according to the actual situation. See Fig. 3 for details. As shown in Figure 3, for general recording equipment, the cut-off distance of the product is about 1.5m, and the cut-off angle is about 90 degrees. For different recording devices, the distance and angle may vary. Some models have a distance of more than 2 meters and an angle of more 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 general model, the better the effect. When using, please try to keep the distance between the transmitter of the shield and the recording equipment within 1.5m, and the angle (mainly mic port) within 45 degrees. The closer the distance, the smaller the angle, the better the truncation effect.
Please note that the above data are obtained without any barrier between the transmitter and the recording equipment (such as clothes, body, etc.), and the cut-off distance will be shortened in case of barrier.

Functional characteristics
1. Mixing interference mode
This product is a mixing noise interference mode in the industry, which is different from the electromagnetic interference mode adopted by traditional recording interference equipment, so as to avoid electromagnetic radiation to people near the equipment when the recording interference equipment works.
2. the sound cannot be restored
This product is processed by true random number, which is the most seed. After processing, the sound signal of people and the random interference signal of equipment are mixed into one, which can not be restored by technical means.
3. Large coverage
Compared with the traditional recording shielding equipment, the interference distance of this product to the mainstream recording equipment can be more than 2 meters, and the interference angle is more than 120 °.
4. Simple, easy to use and flexible
The product is stable and reliable, high degree of productization, simple and easy to use.
Product function and working principle
One
1. Basic functions
During the working process of the recording shield, it will produce random interference signals, which can ensure that the original voice information can not be restored from the recorded signal. The interference signal not only interferes with the recording equipment, but also does not harm the human body. After the interference signal is picked up by the recording equipment, it will cause only one piece of buzzing noise in the recording signal and can not distinguish the normal sound signal, so as to achieve the purpose of protecting voice information.
2. Working principle
In the working process of the recording shield, the true random number is the most seed, and the high security encryption algorithm is used for encryption operation. Then, the encrypted random number is processed by mixing the high and low frequency sound source, which produces the interference signal with irrecoverable, silent and overlapping effect, and interferes with the sound collection equipment, thus forming the sound shielding effect.
Product advantage
Two
1. Basic product conditions
In the field of recording shielding equipment, there is only one known equipment, which is mainly for the obsolete tape recorders, few models of recording pens, eavesdroppers, etc. For the current mainstream recording equipment, mobile phones, digital recording pens, etc., there is no effect or poor effect.
For this reason, relying on the information security technology accumulated over the years, our company has independently developed the recording shield products to meet the shielding function of mainstream recording equipment such as mobile phones and digital recording pens, so as to protect the safety of users' conversation content.
2. Defects of traditional technical solutions
The traditional recording shielding technology mainly uses the random pulse sequence of wide frequency range for random interference. The high-power high-frequency signal produces electromagnetic interference to the recording equipment, which makes the input voltage or input current of the front end of the acoustic sensor exceed the threshold value of the acoustic sensor, so that it can not work normally and reach the effective voice blocking. This method has no noise, but its main disadvantage is that it only has good interference effect on analog recording equipment, and it is basically invalid for new digital recording equipment. At the same time, high-power wireless electromagnetic signal will produce electromagnetic radiation, which is harmful to human body for a long time.
3. Product competitive advantage
3.1 support the shielding of various mainstream recording equipment.
3.2. Within the working range of the shield, the original voice information can not be heard from the recording information by recording equipment.
3.3. Within the working range of the shield, the original voice information cannot be restored from the recorded information by recording equipment.
3.4. The recording screen shall not emit audible sound during operation.
System constraints and limitations
Specific descriptions that are not supported by this product in some scenarios will be described here.
(1) Device type constraints
The device supports the shielding of various mainstream recording devices, mainly including mobile phones, recording pens, wireless / wired eavesdroppers, wireless recording devices, microphones, etc. However, due to the continuous innovation of mobile phone models, different brands, different periods and different levels of mobile phone voice processing parts are not the same, so the recording shielding effect of a small number of mobile phones is relatively poor.
(2) Coverage constraints
Limited by the technical principle adopted, the effective shielding distance of the product is generally 2.5m-3m, the effective shielding angle is about 120 °, and there will be some differences for different recording equipment.