DECtalk and VeriVox: intelligibility, likeability, and rate preference differences for four listener groups.

The intelligibility, likeability, and speech presentation rates for two types of popular synthesized speech, DECtalk and VeriVox, were investigated across four age groups ranging from 6-85 years old. Results for all age groups revealed differences in intelligibility between synthesized adult and child voices, with intelligibility scores for child synthesized voices significantly below those for adult synthesized voices. The most popular synthesized voices were from the VeriVox family.