Speech Synthesis, Bell System Science Experiment No. 3

This Bell Telephone Laboratories educational science experiment is an electronic vowel sound synthesizer. It came with a 133 page book, Speech Synthesis, An Experiment in Electronic Speech Production, (c) 1963, by Cecil H. Coker, Peter B. Denes, and Elliot N. Penson. The book covers human speech production and it's synthesis. The kit makes vowel sounds, (a,e,i,o,u) when correct value capacitors are inserted in the 3 Formant Generators. It requires 3 input voltages from 1.5 volt batteries in series.


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