RESEARCHERS WEAPONIZE EM INJECTION TO EAVESDROP ON HEADPHONES FROM 30 METERS AWAY

Summary from the TLDR Hardware newsletter

An attacker beaming a tuned electromagnetic carrier at a device can exploit the nonlinearity already built into ordinary components like amplifiers, ADCs, and power converters to modulate a device's low-frequency secret signals onto that carrier, upconverting them into detectable EM emissions that wouldn't otherwise radiate far enough to intercept. By tuning the injection frequency and amplitude, the resulting InjectEave attack lets an adversary actively shape how much leakage they get rather than passively waiting for it. The team demonstrated eavesdropping on audio from both wired and wireless headphones up to 30 meters away using accessible RF gear.