Voder

With the Voder (" Voice Operation Demonstrator " ) by Homer Dudley, it was possible for the first time, with an electrical device to synthesize speech. The Voder but had to be operated manually. In order to control its operation, it took a one-year training. He was first presented in 1939 at the World Fair in New York.

By means of a wrist switch could be used to determine whether the original signal by a sine wave generator for voiced sounds (the frequency could be varied by a pedal ), or generated a noise generator for unvoiced sounds.

This signal has now been changed so far with the help of several, controlled by the user electrical filter that whole sentences revealed.

In parallel with the V or the vocoder has been developed, with the vocoder was designed differently than the Voder not only as a demonstrator.

807285
de