Accession Number : AD0289271

Title :   COMPUTER CONTROL OF AN ANALOG VOCAL TRACT

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s) : DENNIS,JACK B.

Report Date : 1962

Pagination or Media Count : 1

Abstract : DAVO is a dynamic analog of the vocal tract and consists of two parts--an electrical model of the human vocal mechanism and a control system for programming utterances. The model of the vocal tract is a lumped constant transmission line analog of the pharyngeal and oral cavities in which the individual inductance and capacitance values can be varied over a range of two decades by control voltages. Each inductance-capacitance section is analogous to a section of acoustical transmission line in which the area and length vary with the inductance and capacitance parameters. To the main transmission line is coupled a secondary electrical line which is analogous to the nasal passages. The first two sections of this secondary line are electrically controlled by a nasal coupling signal, and represent the action of the velum. The remaining sections are fixed as they do not vary significantly during the production of speech sounds. (Author)

Descriptors :   *SPEECH, DIGITAL COMPUTERS, INSTRUMENTATION, SYNTHESIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE