AL ASAR TECH CO., LTD.  

Product Name: Hidden Silent Air Purifier Recording Shielder Hidden Voice Recording Jammer Model NO.: AAT-007mini-2 Material: Nylon Type: Military Technical Equipment Using Field: Land Usage: Defense Shielding Type: Mobile Phones, Recording Pens and Other Sound Acqu Angle of Action of Single Expander: 90-120 Degree Shielding Distance: 1.2-1.8m Weight: 650g Trademark: AAT Transport Package: Neutral Specification: 184*115*56mm Origin: China Product Description AAT-007mini-2 Hidden Recording Jammer is the latest product of Hidden Recording Shielder developed by AL ASAR TECH. The product is a vehicle-mounted air purifier with good concealment. It can be used in car or small conference rooms to realize recording shielding without anyone's awareness. It is also to realize the information security of voice. The product has remote control switch to open easily.Itemperformance parameterShielding typeMobile phones, recording pens and other sound acquisition devicesShielding distance1.2-1.8m (shielding distance of different recording equipment is different)Function angle90-120 degreeOpening moderemote controlRemote control distance>10msize184*115*56mmweight650gambient temperature-40ºC~55ºCrelative humidity35~85%The power adapterAC 100V~240V DC 12v 5APacking instructionsProtective boxFunctional characteristics1. Mixed-frequency interference modeThis product is the first time in the industry to adopt mixing noise interference mode, which is different from the electromagnetic interference mode used by traditional recording interference equipment, so as to avoid electromagnetic radiation to the people near the equipment when the recording interference equipment works.2. Sound cannot be restoredThis product is processed by the most seed of true random number. After processing, the human voice signal and the random interference signal of the equipment are mixed together, and can not be restored by technical means.3. Wide coverageCompared with the traditional recording shielding equipment, the interference distance of this product to the mainstream recording equipment can be more than 2 meters, and the interference angle is more than 90 degrees.4. Simple, Easy to Use and FlexibleThis product is stable, reliable, highly product-oriented, simple and easy to use.Product Function and Working Principle1. Basic FunctionsDuring the working process of the recording shield, random interference signals will be generated, which can ensure that the original voice information can not be recovered from the recording signal. The interference signal interferes with the recording equipment without harming the human body. When the interference signal is picked up by the recording device, it will cause only a buzzing noise in the recording signal and can not distinguish the normal sound signal, so as to achieve the purpose of protecting the voice information.2. Working PrincipleIn the working process of the recording shielder, the true random number is the most seed, and the high-security encryption algorithm is used to encrypt the random number. Then the encrypted random number is processed by mixing the high-frequency and low-frequency sound sources. The interference signal with unrecoverable, silent and overlapping effect is generated, which interferes with the sound acquisition equipment, thus forming the effect of sound shielding.Product advantage1. Basic Product StatusIn the field of recording shielding equipment, there is only one device known to people. The recording shielding equipment is mainly aimed at obsolete tape recorders and very few types of recording pens. For the current mainstream recording equipment, mobile phones, digital recording pens and so on have no effect or very poor effect.For this reason, relying on the information security technology accumulated over the years, our company independently developed the recording shield products to meet the shielding function of mainstream recording devices such as mobile phones, digital recording pens and so on, so as to protect the conversation content security of users.2. Defects of traditional technology schemesThe traditional recording shielding technology mainly uses the random pulse sequence in a wide frequency range to interfere with the recording equipment. High-power and high-frequency signals produce electromagnetic interference to the recording equipment, which makes the input voltage or current of the front end of the acoustic sensor exceed the threshold of the acoustic sensor, so that it can not work normally and achieve effective voice blocking. This method has no noise, but its main disadvantage is that it can only interfere with analog recording equipment better, and the new digital recording equipment is basically ineffective. At the same time, high-power radio electromagnetic signal will produce electromagnetic radiation, which is harmful to human body when used for a long time.3. Product Competitive Advantage3.1. Supporting the shielding of various mainstream recording devices.3.2. In the working range of the shield, the original voice information can not be heard from the recorded information by recording equipment.3.3. Within the scope of the shield, the original voice information can not be restored from the recorded information by recording equipment.3.4. The recording shield does not emit audible sound during the working process.System constraints and constraintsSpecific descriptions that this product does not support in some scenarios will be described here.(1) Equipment type constraintsThe device supports the shielding of various mainstream recording devices, including mobile phones, recording pens, wireless/wired, wireless recording devices, microphones, etc. However, due to the constant innovation of mobile phone models, different brands, different periods and different levels of mobile phone voice processing parts are different, so the recording shielding effect of a few types of mobile phones is relatively poor.(2) Coverage constraintsLimited by the technical principles adopted, the effective shielding distance of the products is generally 100-150 mm, the effective shielding angle is about 90, and there will be some differences for different recording devices.