Silent sound technology allows for the transmission of information without using vocal cords. It works by monitoring tiny muscular movements in the lips and face that occur during speech and converting them into electrical signals that can then be transformed into computer-generated sound. Some key features include enabling silent phone calls and translating a speaker's silent utterances into another language for the receiver to hear. Applications include aiding those who have lost their voice and covert military communications. The technology represents an innovative trend that may become useful in everyday life as it continues to develop.