In summer 2021 I started ITC experiments with devices that incorporated rather electromechanical principles instead of electronics. There still was some electronic in use but mainly I transferred the mechanical vibrations of an oscillating relay via a mechanical spring to a diaphragm in a cardboard tube. I called this design the

VISPRE

The results were pretty good. As ot turned out the whole system acted like the emulation of a human larynx and pharynx.

I decided to extend my experiments on more mechanically based methods to generate vibrations to be transferred to a diaphragm.

My latest design was using a small slow turning motor with a spring and a ball mounted to the shaft. The acting of the slow turning ball pressed against the diaphragm generated voice patterns. A problem was that the noise from the gears contaminated the signal. Most amazingly after a while I found out that this noise gave much better results than the original signal.

To gain more entropy I combined the motor with the 

SPICA

circuit. As I found out the Lingua speech processor gave very interesting results after picking up the sound signal from the inside of the tube.

The voices have a very characteristic sound. All are in German.