1. A method of extremely narrowband communication comprising the steps of: converting human speech to electrical signals; analyzing the electrical signals to provide a plurality of signals representative of a plurality of properties which characterize a human voice; storing signals representative of a plurality of spoken words; comparing at least some of the plurality of signals to the stored signals to determine specific words in the human speech and supplying signals representative of the specific words; and converting the supplied signals representative of specific words to a digital form having a rate of less than 300 bits per second.
1. A method of extremely narrowband communication comprising the steps of: converting human speech to electrical signals; analyzing the electrical signals to provide a plurality of signals representative of a plurality of properties which characterize a human voice; storing signals representative of a plurality of spoken words; comparing at least some of the plurality of signals to the stored signals to determine specific words in the human speech and supplying signals representative of the specific words; and converting the supplied signals representative of specific words to a digital form having a rate of less than 300 bits per second. 2. A method as claimed in claim 1 including the step of recognizing the beginning and the end of each spoken word prior to the step of comparing.