The Voder as demonstrated by Mrs Harper at The Franklin Institute, c. 1939. The Voder (Voice Operation DEmonstratoR) was Bell Telephone Laboratory's first attempt to electronically synthesize human speech.

The Voder as demonstrated by Mrs Harper at The Franklin Institute, c. 1939. The Voder (Voice Operation DEmonstratoR) was Bell Telephone Laboratory’s first attempt to electronically synthesize human speech.