Accession Number:

AD0289271

Title:

COMPUTER CONTROL OF AN ANALOG VOCAL TRACT

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s):

Report Date:

1962-01-01

Pagination or Media Count:

1.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE