俄罗斯厂商发布第三代防录音干扰器

日期：2020-11-13 18:14:28 | 人气：

 

10月21日，国际知名防录音设备制造商俄罗斯i4 Technology公司发布第三代防录音干扰器—BDA4。在其官方介绍里，新款的防录音干扰器除了外观做成了音箱样式外，在技术上加入了期待已久的人耳不可闻的“18-19khz类语音”干扰频率，以应对苹果系列手机录音算法中的降噪技术。



以下是官方对BDA4的性能介绍：


"BugHunter DAudio BDA-4 Voices" is a new microphone, dictaphone jammer with 8 ultrasonic transducers and 1 acoustic speaker. The newly upgraded jamming system creates acoustic interference in the air thus allowing to suppress even highly protected microphones (IP65-68). Joint use of 8 ultrasonic transducers located on the front panel and 1 acoustic speaker creates a "veil" with ultrasonic and acoustic interference — 2 in 1.
If used properly, BDA-4 is capable of jamming most types of microphones, including professional ones, within a range from 60 cm to 9 m (2 ft to 30 ft) depending on the microphone’s protection level. We recommend to use the device in square rooms with a height of up to 3.5 m (11 ft) for maximum efficiency. Ultrasonic interference will be reflected multiple times thus enhancing the power of jamming

BDA-4是一款全新的防录音干扰器，带8个超声发射器和1个扬声器的录音干扰器。新升级的干扰系统会在空气中产生声学干扰，从而甚至可以压制和干扰受防水防尘保护的录音器拾音咪头（IP65-68）。同时使用超声波和类语音、白噪音干扰，可以达到更好的叠加防护性能。

如果使用得当，BDA-4根据录音设备不同以及拾音麦克风的防护等级可以提供60 cm至9 m的干扰范围。我们建议在最大高度为3.5m的方形房间中使用该设备。超声波将会被墙壁或其他拥有坚硬外壳的物体多次反射，从而增强干扰能力。

"BugHunter DAudio BDA-4 Voices" features a new jamming system:

  • Ultrasound combined with audible frequency

    . Now ultrasonic interference consists of two frequencies simultaneously: ultrasound (frequency range is over 20 kHz) and acoustic sound (frequency range is 18-19 kHz) with speech-like noise that not only jams microphones, but overloads them. Dictaphones can’t record sounds and only receive interference transmitted from BDA-4. The interference signal forms not immediately, but in the air, approximately 40-60 cm (1.3-2.0 ft) from the transducers, when the frequencies overlap each other, forming a dense and powerful interference.

  • White noise mode

    . It is an indispensable mode for negotiations when all parties are aware of the jammer operating. This mode provides 100% protection from eavesdropping. BDA-4 mixes your words with the noise signal that comes out of its transducers and covers a fairly large frequency range with numerous reflections in a room, which causes a "shock" to any dictaphone.

BDA-4具有新的干扰算法：

· 超声波和声学干扰结合。现在，超声干扰同时包含两个频率：超声波（频率范围超过20 kHz）和声学（频率范围为18-19 kHz），以及类似语音的噪声，不仅会干扰麦克风，还会使麦克风失效。无法录制声音，只能接收从BDA-4传输的干扰。当频率彼此重叠时，干扰信号不是立即形成的，而是在空中形成的，距离传感器大约40-60厘米（1.3-2.0英尺），形成密集而强大的干扰。

· 白噪声模式。当谈话双方或多方都知道设备正在运行时，为防止他人窃听，可开启白噪音模式。此模式可提供100％的窃听保护。 BDA-4将您的声音与它的声学扬声器发出的噪音混合在一起，并覆盖了相当大的频率范围，在房间中发生了多次反射，这会导致任何的录音设备反复受到“冲击”。


BDA-4 is designed to protect negotiations from eavesdropping devices. The device is capable of jamming radio microphones, wired microphones and most types of professional digital dictaphones, including dictaphones built into smartphones.
Our jammer is completely safe for people as it generates frequencies that are not perceived by human ears. The only thing which is heard clearly is "white noise". "White noise" is a combination of sounds with a slight pressure in comparison to ultrasonic interference. Ultrasonic interference reaches record sound pressure of 125 dB. *

BDA-4旨在保护谈判免受窃听设备的侵害。该设备能够干扰无线电麦克风，有线麦克风和大多数类型的专业数字录音电话，包括智能手机中内置的录音电话。

我们的干扰器对人来说是完全安全的，因为它会产生人耳无法感知的频率。唯一清楚听到的是“白噪声”。 “白噪声”是声音的组合，与超声波干扰相比，压力较小。超声波干扰达到创纪录的125 dB声压。 *

The device generates ultrasonic signal through 8 transducers and 1 additional speaker with the frequency range of 18-19 kHz. Frequency of ultrasound is determined by a micro-controller and variates according to a specially developed algorithm. A combined ultrasonic signal generated by the device affects eavesdropping devices (microphones, dictaphones, cellphones etc.), making them overloaded on the wide frequency range. Eavesdropping devices do not break down, but either chaotically record only indiscriminate noise in which conversation can't be distinguished or just stop recording.

该设备通过8个超声波发射器和1个扬声器产生干扰频率，频率范围为18-19 kHz。超声波的频率由内置微电脑确定，并根据专门开发的算法进行变化。该设备生成的组合超声信号会影响窃听设备（麦克风，录音机，手机等），使它们在很宽的频率范围内过载。窃听设备不会崩溃，但是要么产生混乱的无法分辨的声音，要么停止录音。

此外，强大的扬声器会产生类似语音的干扰，从而达到更好的效果。使录音设备的录音只会是杂乱无章的杂音，而用声音处理软件恢复谈话是不可能的。声音干扰是随机产生的，因此即使使用特殊专业设备也无法将干扰器的干扰噪音滤除。

这样复杂的安全系统可提供最大程度的保护和机密性。即使是最专业的间谍软件和窃听设备也变成了无用的“玩具”，因为它们根本无法记录任何信息。他们只会听到或者录下没有规律的杂音。同时，由于人耳无法感知超声波信号，因此设备工作时是静音的，不会发出声音，并且可以轻松调节类似语音的声音音量来达到最佳的谈话环境。