Found in smartphones and smart speakers. These are highly susceptible to ultrasonic interference.
There are several types of audio jammers, including: the working principle of audio jammer
The audio jammer is less of a "silencer" and more of a . It exploits a hidden flaw in cheap hardware using frequencies we cannot perceive. It is a brilliant, narrow-spectrum weapon against unsophisticated eavesdroppers. However, against a professional with a high-end, linear microphone, the jammer is about as effective as whispering to a person wearing concrete earplugs. Found in smartphones and smart speakers
If you play back the recording from the bugged device, you won't hear a conversation. You will hear a harsh, static hiss or a rapid "chattering" sound—the ghost of the ultrasonic sweep. against a professional with a high-end