How to prevent illegal recording and malicious recording?

　　When the recorder makes an illegal recording, he opens the recording shield and emits ultrasonic waves with random noise that the human ear cannot perceive. These noises and the sound of normal conversation are recorded into the digital device, making the recorded audio invalid. The audio information in the video also has the same interference effect. Since the noisy ultrasonic noise is randomly generated and cannot be restored, the audio after the interference cannot be restored, thus ensuring that the original information is not leaked and spread. It also achieves the purpose of protecting voice information and removing hidden dangers of eavesdropping.

　　If a worker wants to do well, he must first sharpen his tools. In order to meet the needs of our customers and completely solve the problem of voice information leakage, Shenzhou Mingda has focused on information security for 14 years. The newly developed L7B recording muting device has been upgraded on the basis of the original equipment. The FPGA-based ultrasonic noise algorithm has eliminated The high-frequency noise of the old equipment is added to the information of various brands of mobile phones and recording equipment that have been on the market in the past two years, which has a very obvious effect on the new recording equipment and mobile phone recording.

　　The recording jammer is only effective for mobile phones and other digital products, and does not interfere with people. Because the human body does not receive ultrasonic waves, the mobile phone records all noise, but people cannot hear it, so it does not affect normal conversation and communication, and even cannot detect the prevention. The recorder is working. The protection range of the anti-recorder is similar to a cone-shaped space, the interference range is about 15 square meters, and the interference distance to most mobile phones and other digital products is more than 2 meters, which can form a safe space. In this space, there is no need to worry about being affected by others. For recording, the sound waves emitted by the anti-recorder can only be received by digital products such as mobile phones and voice recorders, but cannot be heard by humans. Compared with other anti-recorders, there is no buzzing noise, and it can quietly guard the conversation environment and prevent others. aware.

　　At present, the issue of voice leakage has always been a worldwide problem, and voice leakage incidents in various places have emerged in an endless stream. Some voice information leakage incidents even involve the level of national security. Individuals and organizations have been suffering from not having a good voice information confidentiality product. Technically, this problem is solved very well. The recording blocker can help you when you want to talk with old friends or talk at the dinner table without wanting the content of the conversation to be leaked or made public. Just turn on the switch button, it will emit a harmless ultrasound that exceeds the threshold of human hearing, and the sound of normal conversation will be submerged in random noise.

　　Recording muting deviceThis product can realize recording muting in a concealed manner under silent conditions. When criminals use recording equipment (such as mobile phones, voice recorders, bugs, etc.) to record you, the recording muting device will generate random noise signals, which can produce suppressive interference to the voice signal, causing the recording equipment to pick up the noise. There is only noise information, but the voice information cannot be distinguished, and the original information cannot be restored from the recorded signal, thereby ensuring the security of the voice information.

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