speech synthesis

from The Free On-line Dictionary of Computing (8 July 2008)

speech synthesis

   The generation of an sound waveform of human speech from a
   textual or phonetic description.  See also {speech
   recognition}.

   There are demonstrations which say a number
   (http://cs.yale.edu/cgi-bin/saynumber.au) or say a
   phrase (http://wwwtios.cs.utwente.nl/say/form/).