looking at spectrogram in praat cs4706 jan 30 n.
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Looking at Spectrogram in Praat cs4706, Jan 30. Fadi Biadsy. Praat. http://www.fon.hum.uva.nl/praat/ Developed by Paul Boersma and David Weenink    Institute of Phonetic Sciences University of Amsterdam The Netherlands

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praat
Praat
  • http://www.fon.hum.uva.nl/praat/
  • Developed by Paul Boersma and David Weenink   Institute of Phonetic SciencesUniversity of AmsterdamThe Netherlands
  • General purpose speech tool: editing, segmentation and labeling, audio DSP, prosodic manipulation
praat1
Praat
  • Pros: designed for speech analysis (not only sound edition or spectrogram visualization), nice GUI, scripting, active development and community, prosodic manipulation
  • Cons: limited scripting language, slow GUI
let s
Let’s…
  • See the pitch contour of Solfege:
  • Compare the spectrograms of

1.  It’s hard to recognize speech

    • It’s hard to wreck a nice beach
  • Record something with clipping
  • Record “it’s cool to play with praat”
    • Manipulate the pitch contour
    • Annotate this utterance
task1
Task1
  • Record a file with all the vowels and look at the formants to see how they differ
task2
Task2
  • Record files with each consonant class as defined by manner of articular/voiced and unvoiced, all in the context of the same vowel, to see what the spectrograms look like: /pax/, /tax/, /kax/; /bax/, /dax/, /gax/
task3
Task3
  • Record something in a very loud voice, to produce clipping, and seewhat the waveform looks like
task4
Task4
  • Create a sound from equation with noise, and try to filter the noise out
task5
Task5
  • record speech with some noise (hum, transients) in the background andsee was the spectrogram tells them; try filter out the noise.
task6
Task6
  • Record a sample of the same short sentence as angry speech, sadspeech, happy speech, and see what things (pitch contour, pitch mean andmax, intensity mean and max, spectral information) differ. choose something fully voiced if possible.