Lehiste 'An acoustic-phonetic study of open juncture'. Two examples are Peterson & Lehiste 'Duration of syllable nuclei in English' and This was a topic that was central to phonetic research in the early period (late 50's to early 70's), so reading linguistic phonetic works from those days will be very informative.
#Highlighting vowels praat full#
For example, in parsing English, you have to decide whether the velar release burst is the end of the consonant, or do you go for the beginning of voicing (which itself calls for a judgment: do you need one complete semi-sinusoidal period in the waveform to determine that you now have voicing? do you subject the parsing to a stronger criterion of full modal voicing?).
There are enough criteria that the decision is unprincipled, that is, there isn't some unquestionable principle that you can use to deduce where the lines must go, if you are looking for phoneme boundaries. Is there a principled basis for choosing one of these points - or perhaps another one altogether - as the boundary between consonant and vowel? If I move the boundary so that the second segment sounds like /ə/, the end of the bit that is supposed to be /c/ is audibly voiced.Ĭlearly there are a number of things going on in this transition and they don't all happen simultaneously (or instantaneously). I am not sure how far I can trust the vocal pulses shown in Praat, but in any case I still get the /də/ if I put the boundary here. Slightly later still, the first vocal pulse appears. The waveform has a very clear change in shape near the beginning, so the obvious starting point is to treat the first shape as /c/ and the rest as /ə/ - but if I do that the bit that is supposed to be /ə/ sounds like /də/.Īt a slightly later point, I would say that the formants settle (they are a bit wobbly throughout) - but again a boundary there gives me /də/. Praat obviously provides a good few clues, but I'm not sure how much weight I should attach to them. I am finding that in many cases, one sound blends into another and it's hard to say where the dividing line is. I am trying to segment some connected speech in Praat, and want to get the boundaries between phonemes as accurate as possible.
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