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source:Industry News release time:2021-03-25 Article author:sznbone Popular:Prison Jamming system
How to effectively avoid being recorded? "target="_self">Recording jammer, which uses random ultrasonic noise to interfere with voice messages, making the recorded voice unable to be broadcast normally. The FPGA-based ultrasonic noise algorithm is effective for mobile phones of all brands and brands that have been on the market in the past two years. Voice recorders have very good interference effects. The product is suitable for confidential meeting rooms, public security bureau petition centers, procuratorate reception halls, courts, negotiation rooms, offices and other places for private conversations.
Recording jammer products have the following outstanding advantages: the appearance of a speaker-type product is exactly the same as an ordinary speaker on the surface, and the background noise is increased, and the concealment is extremely strong. Compared with other products on the market, its interference power is larger, the noise signal picked up by the recording device is stronger, and the shielding effect is stronger. Compared with other products, its shielding distance is longer. The interference distance of recording jammers to most mobile phones on the market is more than two meters. For some recording equipment, the shielding distance of mobile phone voice recorders can reach 5 meters, which covers a wider range of equipment. For mobile phone recorders of mainstream brands, the coverage rate of recording jammers can reach over 85%, which is much higher than similar products on the market.
The working principle of the recording jammer: by emitting ultrasonic waves with random noise that human ears cannot perceive, when digital devices such as mobile phones are recording, 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 noise with 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. .
Recording jammer is a high-tech product that uses technical means to prevent illegal recording. People’s normal conversations are unknowingly recorded by others, and after the recording software is processed and modified, they become a means of threats by people with ulterior motives. If some confidential information related to national security is maliciously traded and then known by those with intention, It has a very serious impact on society, so in order to prevent voice leakage, the use of recording jammers has become a trend!
It is worth noting that it is specifically effective for digital products such as mobile phones and voice recorders. It does not interfere with humans. The human body cannot accept ultrasound. After the recording jammer is turned on, the mobile phone records all noise, but people cannot hear it. , So it does not affect the normal conversation and communication, and it is impossible to detect that the anti-recorder is working.
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