Using the recording pen in an appropriate way will help us in our study and work, and it can help us record important meeting content. But in movies, it is usually used to record conversations and then threaten the other party. Using the voice recorder may reveal the privacy of others. How to prevent the use of recording pens in important places such as conference rooms and offices?
Let’s first understand 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 recording process 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 the sound playback is to decode the stored digital signal into audio and then output it by the audio amplifier.
Before you prepare for a meeting, especially in the office, check whether there are recording pens, eavesdroppers and other equipment hidden. The recording equipment is usually very small and cannot be found out completely. You can use a recording blocker to prevent being recorded by recording. The device generates random noise signals and 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 blocker adopts security encryption processing, and effectively prevents post-recovery by mixing high and low frequency audio sources.
At present, there are many manufacturers selling such products on the market, but the quality is uneven. When purchasing, you must pay attention to multiple aspects to compare. Shenzhou Mingda has been focusing on information security for 14 years. The newly developed L7B recording blocker is in the original The equipment is re-upgraded. The FPGA-based ultrasonic noise algorithm eliminates the high-frequency noise of the old equipment. It adds the information of various brands of mobile phones and recording equipment that have been on the market in the past two years. It is very obvious for the new recording equipment and mobile phone recording. effect.
The recording jammer is a portable, highly integrated security protection device that integrates ultrasonic interference and voice sound wave interference. It can effectively interfere with digital and analog recordings such as voice recorders, mobile phone recordings, and tape recordings, and interfere with wireless eavesdropping, wired eavesdropping, and isolation. Various voice eavesdropping devices such as wall tapping and laser tapping make it impossible to identify the conversation voice obtained by the eavesdropper, thus effectively protecting your privacy.
The recording blocker is characterized by high interference intensity: our self-developed FPGA-based ultrasonic noise algorithm can effectively interfere with digital devices such as mobile phones, voice recorders, etc., can record noises, and completely eliminate what a few people can hear Piercing sound. The anti-recorder can interfere with 95% of mobile phones at a distance of more than two meters, 60% of mobile phones at a distance of more than 5 meters, and iPhone X, iPhone 8 and other mobile phones at a distance of 10 meters, which can effectively protect the content of conversations. There are many interference devices: it has good interference effects on various mobile phones such as iPhone series, Huawei Mate, Honor, OPPO, VIVO, Samsung, Nubia, Meizu, Nuts, etc., and it has good interference effects on Sony, Samsung, Sanyo, Newman, Lenovo, Olympus, etc. The sound recorder has a good interference test effect.
Post time: Mar-19-2021