Our synthetic phonemes rely upon parameters obtained from sampled utterances. The equipment available to us was restricted to an 11 kHz sampling rate, so our modelling was performed accordingly. Our sounds are presented here in the popular .au format (mu-law companded). Unfortunately, some audio software and hardware in use is restricted to sampling rates other than 11 kHz. (An 8 kHz rate is popular.) Our sounds will vary in pitch with the playback rate but will remain intelligible. Our sampled utterances and synthetic sounds may be converted to 8 kHz with suitable downsampling.
The phonetic sounds specified in the ARPABET [1] are classified thus [2]:
voiced sounds (vowels and pseudo-vowels)
voiced fricative consonants
unvoiced fricative consonants
voiced stop consonants
unvoiced stop consonants
glottal stop