Abstract: A speech analyzer and synthesizer uses simulation of the acoustic behavior of a tube divided into portions having variable sections. The section variations of the various portions of the tube generate sounds corresponding to voiced phonemes when an air flow and pressure source is positioned in analogy with human vocal cords. Using simulation techniques, it is possible to generate the phonemes in the form of electric signals supplied to a loud-speaker. The selection of tube portion lengths correlates to the accuracy of the approximation desired. For a three-formant approximation (formants are the tube resonance frequencies), the tube is divided into eight portions having successive lengths, L/10, L/15, 2L/15, 3L/15, 3L/15, 2L/15, L/15 and L/10, where L is the overall length of the tube.