![]() This could turn headphones, left plugged in, into microphones. Mordechai Guri and the other researchers at BGU have demonstrated that the Realtek chipset used by many PC motherboards allows reprogramming of the jack. ![]() The principle in speakers of using electricity to modulate air and create sound, is the same principle in microphones, just in reverse – using air movement (from sound) to create electric signals. That has been demonstrated ever since they were first invented. The fact that speakers can be used as microphones is nothing new. ![]() ![]() Researchers from the Negev Cyber Security Research Center of Ben-Gurion University have presented a paper explaining that the software controlling signals to headphone jacks in many computers can be altered or re-tasked to change the jack from an output to an input, thereby turning the earphones into potential microphones.
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