MobileHackadayabout 4 hours ago
Mic Jammer Relies on Ultrasound
2 min read
A device called a mic jammer uses an RP2040 microcontroller and 20-80 ultrasonic transducers to block phone microphones. The jammer modulates PWM signals to confuse automatic gain control systems. An iPhone 17 recording showed the speaker's voice replaced by garbled noise while the jammer was active.
Level
Hype check
Tap to vote and see what everyone thinks.
Summary by ByteBrief
