In the current era of highly developed information technology, people can be eavesdropped anytime and anywhere, so it is particularly important to protect personal privacy. A recording jammer is a common privacy protection device.
This paper will introduce the technical principle and application scenario of the recording jammer.
1. Technical principle of recording jammer
Recording jammer is a kind of electronic equipment, its basic principle is to generate high-frequency interference signals, interfere with the normal work of the recording equipment, so that the recording equipment can not record sound. In the recording jammer, the high-frequency interference signal is generated by the high-frequency oscillator, and is amplified and filtered to make its interference effect more obvious.
The working principle of a recording jammer can be divided into two ways:
One is through the generation of ultrasonic mixing technology, through the built-in ultrasonic transducer to drive the ultrasonic probe group to emit a variety of frequencies of ultrasonic waves that cannot be sensed by the human ear for mixing. The mixing ultrasonic waves are demodulated by air to produce frequencies that can be picked up by mobile phones, recording pens and other digital products. Ultrasonic direction is strong, the transmission distance is far, the sound pressure level is large, so as to cover the normal sound of speaking, so that the recorded audio is only "buzz" noise, so as to avoid information leakage.
Ultrasound is a part of the sound wave, is the human ear can not hear, frequency higher than 20Khz sound waves, it and sound waves have in common, that is, are generated by material vibration, and can only spread in the medium.
The other is to generate high-frequency signals, so that the microphone of the recording device can not receive the normal sound signal, so as to achieve the interference effect. Both methods can effectively interfere with the normal work of the recording device to achieve the effect of privacy protection.
2. Application scenario of recording jammer
Recording jammers can be used in a variety of scenarios, mainly including the following:
Business negotiation: Business negotiation is a highly confidential scene, and the recording jammer can effectively prevent the negotiation process from being eavesdropped. Therefore, business negotiation is one of the most common application scenarios of recording jammers.
Personal privacy protection: In some public or private places, such as hotel rooms, offices, cars, etc., the use of recording jammers can effectively protect personal privacy and avoid personal privacy being wiretapped.
Conference room confidentiality: The conference room is one of the most confidential places in the enterprise, so the use of recording jammers in the conference room can effectively prevent confidential information from being leaked.
Intelligence agencies: Eavesdropping and anti-eavesdropping technology is a very important part of intelligence agencies. As a kind of anti-eavesdropping technology, audio jammers can help intelligence agencies protect the security of important information.
Scientific research experiments: In some scientific research experiments, it is necessary to record the experimental process for subsequent data analysis. However, if the experimental process is illegally recorded or stolen, it will reveal the key information and research results of the experiment, resulting in the experiment losing its significance. Therefore, in scientific research experiments, the use of recording jammers can effectively prevent the experimental process from being stolen or recorded, and protect the confidentiality of research results.
Business negotiations: In business negotiations, the parties will exchange trade secrets, such as business plans, pricing strategies, etc. If the negotiation process is illegally recorded or stolen, trade secrets will be leaked, leading to the breakdown of business cooperation. The use of recording jammers can effectively prevent the business negotiation process from being stolen or recorded, and protect the security of business secrets.
Personal privacy protection: In public places such as cafes, restaurants and other places, personal privacy is often faced with the risk of eavesdropping, such as being stolen by others bank card passwords, personal privacy information. The use of recording jammers can effectively prevent personal privacy from being eavesdropped and ensure personal privacy security.
