From Longman Dictionary of Contemporary Englishspeech synthesizerˈspeech ˌsynthesizer (also speech synthesiser British English) noun [countable] TDa computer system that produces sounds like human speech
Examples from the Corpus
speech synthesizer• When I have built up what I want to say, I can send it to a speech synthesizer.• I think that is in a large part due to the quality of the speech synthesizer, which is made by Speech Plus. 