What is a recording jammer? What is the principle?

source:Industry News release time:2020-12-03 Article author:sznbone Popular:Prison Jamming system

　　Recording jammer is also called a recording jammer or anti-recording device. It is an instrument that shields and interferes with recording. By generating random noise signals, it produces suppressive interference to the voice signal, so that only noise information is picked up by the recording device, 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 . The recording jammer adopts security encryption processing, and effectively prevents post-recovery by mixing high and low frequency audio sources.

　　In today’s society, information is rapidly developed, audio and video information is showing explosive growth and viral transmission. The problem of voice information leakage is a difficult problem in the world. People’s normal conversations are recorded silently. Reprocessing out of context has become a means of coercion by people with ulterior motives, and some important information related to national security is illegally recorded and spread, becoming a security risk! How can valuable conversations not be stolen by others?

　　For this reason, Shenzhou Mingda spent 7 years devoting himself to the development of a recording jammer product, which can effectively prevent illegal sound collection such as mobile phones, voice recorders, video audio parts, recorders, etc. Recording jammers can be widely used in confidential meeting rooms, public security bureau petition centers, procuratorate reception halls, courts, negotiation rooms, offices and other places for private conversations to meet the various needs of meeting rooms and individuals.

　　The principle of recording equipment: With the development of science and technology, the popularization of mobile phones, voice recorders, micro-devices or disguised eavesdropping devices, business security is facing a huge threat. The process of recording is that the microphone (MIC) first collects the surrounding sound, converts the sound into an analog signal, amplified by the amplifier, and then sends it to the analog/digital conversion circuit to convert it into a binary digital signal, and writes sequentially under the control of the write signal It is stored in the memory RAM, and when playing sound, the stored digital signal is decoded into audio and then output by the audio amplifier.

　　The L7B recording jammer emits ultrasonic waves with random noise that human ears cannot perceive. When recording on digital devices such as mobile phones, these noises are recorded into the digital device together with the sound of normal conversations, making the recorded audio invalid. The audio information in the captured video also has the same interference effect. Because 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.

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