Researchers can make headphones leak audio through a wall, but the 30-meter claim has a few caveats
HKUST (Guangzhou) and HK PolyU researchers' InjectEave beams a radio carrier at devices so their own circuits leak analog audio The leaked audio has already been decrypted by the device itself, making encryption offer no protection against such an approach The 30m headline needed a pricey amplifier pushing output to 10 W, while standard ranges of 1 to 6m were measured by detecting a test tone Rese…