A recording jammer is a device used to shield recording in a specific environment. It can effectively interfere with digital and tape recorders, video cameras, and eavesdropping devices. It can effectively interfere with digital recording pens and tape recorders with a frequency of 100HZ-20000HZ. By outputting white noise outside the frequency range of human hearing, the recording pen or recorder records only a piece of "humming" noise, and the conversation content of the speaker cannot be recorded, and the recorded voice cannot be restored after sound post-processing. sound (because the sound captured by the recording device is only noise). Thus, the dialogue content is effectively protected from being secretly recorded. At the same time, the recording device jammer does not emit any visible sound at work.
