Dynamic Analog Speech Synthesizer
作者:
George Rosen,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1958)
卷期:
Volume 30,
issue 3
页码: 201-209
ISSN:0001-4966
年代: 1958
DOI:10.1121/1.1909541
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A dynamically controllable electrical analog of the vocal tract capable of synthesizing sequences of speech sounds is described. The acoustic transmission line between the glottis and lips in the human vocal tract is realized electrically by eleven electronically controlled variableLCsections plus three fixed sections. Each variable capacitor is realized by means of the Miller effect, and the inductors are saturable reactors. Both elements of each section are controlled by a single voltage in a manner that constrains theLCproduct to remain constant, and varies the ratioL/Cto simulate changes in effective cross‐sectional area. The analog can be excited by a buzz source to simulate the glottal tone, by a noise source inserted at various distances from the glottis to simulate the noise of turbulence, or by both together. Thus, vowels and most consonants can be produced with equal facility by the dynamic analog. Control voltages are derived from a resistance network in which a series of desired articulatory configurations is stored. A timing arrangement chooses the excitation and articulatory configurations in the proper sequence, and smoothing circuits are used to assure natural transitions from one configuration to the next.
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