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Developed by researchers at Germany's Karlsruhe Institute of Technology (KIT), the technology allows your cell phone to read your lips, converting silent mouth movements into speech. Based on the principle of electromyography, the system measures the tiny electrical signals produced by the facial muscle movements as you speak, even when you are not audibly uttering any words. These pulses are transferred to a device that amplifies and converts them into sound on the other end of the line. This way, the user can speak into the phone soundlessly, but is still understood by the conversation partner.

For the device to work, nine electrodes require to be attached to the user’s face. The inventor, Professor Tanja Shultz, admitted that the technology is not yet appealing for mass market use. But in the future, it could be incorporated into handsets for instantaneous communication.

Initially, the device could be used to help speech-impaired people who have lost their voice from illness or accident to speak again. Another application that this device offers is instant translation. A person could speak in their mother tongue and the text will be translated immediately to another language through a synthesized voice. Of course, it would also be useful for communicating in places like library, cinema and hospital, as well as transmitting confidential information, such as your password and Social Security number.

If the technology is successfully adapted to future cell phones, we will be able to hold phone conversations in areas where silence is the absolute rule, and we won’t have to worry about our personal chats being overheard by others either.