A smartphone was used to hack a 3D printer by manipulating its security vulnerabilities. The smartphone was planted approximately 20 centimeters from the printer. By intercepting the moves of the printer, the researchers could easily recreate the objects with almost 100 percent accuracy. The further the smartphone is placed, the accuracy of the data goes down to 87 percent, and to 66 percent when placed 40 centimeters from printer. Researchers found that, once the distance increases to 30 centimeters, the chances for the data to be collected.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/smartphones-steal-data-through-sound-waves/