Looking at Spectrogram in Praat cs4706, Jan 30

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Looking at Spectrogram in Praatcs4706, Jan 30

• Fadi Biadsy

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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

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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

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Lets

• See the pitch contour of Solfege
• Compare the spectrograms of
• 1.  Its hard to recognize speech
• Its hard to wreck a nice beach
• Record something with clipping
• Record its cool to play with praat
• Manipulate the pitch contour
• Annotate this utterance

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Task1

• Record a file with all the vowels and look at the
  formants to see how they differ

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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/

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Task3

• Record something in a very loud voice, to produce
  clipping, and seewhat the waveform looks like

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Task4

• Create a sound from equation with noise, and try
  to filter the noise out

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Task5

• record speech with some noise (hum, transients)
  in the background andsee was the spectrogram
  tells them try filter out the noise.

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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.

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