PRAAT activities
Download PRAAT to complete the rest of this Points to Ponder.
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Free Download PRAAT for windows
http://www.fon.hum.uva.nl/praat/download_win.html
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Free Download PRAAT for Mac
http://www.fon.hum.uva.nl/praat/download_mac.html
9. Using PRAAT measure jitter, shimmer, and the Mean Harmonics to Noise Ratio of your voice. You will record your sample like you did in the past and then add a few additional analyses.
Once you record and save your waveform. Click on
View and Edit.
Highlight your sample using the cursor. Click on
Pulses.
Then click on
Show Pulses. Once your pulses are highlighted you can click on
Voice Report which is under Pulses.
You will see
a lot
of data. I only want you to record the numbers indicated below. 12 points
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Record “ah” and sustain it for as long as you can.
o
Record your jitter number (local)__________________
o
Is your jitter number within normal limits?_____________________
o
Record your shimmer number (local)___________________
o
Is your shimmer number within normal limits?________________
o
Record your Mean Harmonics to Noise Ratio______________________
o
Is your Mean Harmonics to Noise Ratio within normal limits?_______________________
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Record “Ah, what a wonderful day!”
o
Record your jitter number__________________
o
Is your jitter number within normal limits?_____________________
o
Record your shimmer number ___________________
o
Is your shimmer number within normal limits?________________
o
Record your Mean Harmonics to Noise Ratio______________________
o
Is your Mean Harmonics to Noise Ratio within normal limits?_______________________
S/Z ratio
: 5 points each – 10 total
A.
Perform a s/z ratio assessment on yourself. Complete three trials and take the longest duration /s/ and the longest /z/. Divide your /s/ duration by the duration for /z/ to determine the s/z ratio. Report both the durations for /s/ and /z/ as well as the ratio. Do each of the measures fall within normal limits?
B.
Perform a s/z ratio assessment on someone other than yourself using the above method. Do each of the measures fall within normal limits? Change the pitch of your s and z. What happens when you change the pitch?
Phonation: -
5 points
C.
Use a stopwatch to measure how long you phonate. Take a deep breath and phonate a vowel (your choice of vowel) for as long as you can. Perform two more trials to see if your maximum phonation time improves with practice. What other factors do you think could influence maximum phonation time? Try a different vowel or a very low or high-pitch vowel to see if changes in pitch alter your results. What did you find??