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A Study On Vowel Production And Alterations Of English Speakers In Western Sidney

5 Pages / 1,233 Words Published On: 05-02-2021

The process of identifying the vowel target(s)

1. For your own data (/hVd/, /hVt/, /hV/ contexts), segment the vowel interval and identify the target(s) for the monophthongs and diphthongs using Praat. Instructions for Praat can be obtained from the AusTalk corpus. 

The beginning of the vowel is determined by finding the point where voicing begins following the /h/. Some speakers have a great deal of overlap between the /h/ and the following vowel. If this is the case you must be consistent with the criterion you use to identify the boundary. You can choose to use the onset of periodicity or the beginning of F2. Use both the waveform and the spectrogram to establish the beginning of the vowel. A marked increase in amplitude usually accompanies the vowel onset.

The end of the vowel in /hVd/ and /hVt/ contexts is usually found by establishing the point where F2 and F3 end. Don't use F1 to establish the end of the vowel. Look at the waveform as well as this can provide important clues. An amplitude drop will usually accompany stop closure. It can be difficult to identify the end of a vowel in open syllables. Use the waveform and the end of F2.

2. Identify the target position(s) for each vowel. This is typically the position where the formants are changing the least and are therefore somewhat parallel to the base line. The following criteria should be used to establish targets for both the monophthongs and the diphthongal Monophthongs have a single target and diphthongs have two targets.

  • high front vowels – F2 peak
  • low vowels – F1 peak
  • high back vowels – F2 trough

3. Determine the frequency values of F1 and F2 at the target position(s). Record these values. An excel spreadsheet has been provided to help you organise your data. Use whole numbers only. 

4. Determine the duration of the vowels in milliseconds. Make sure you click on the bar below the vowel so that the vowel duration measurement is indicated in the bar above the waveform. It is important that your screenshot/image of each spectrogram shows this value.

5. Plot the monophthong F1/F2 data using established graphical procedures to illustrate the vowel space (see Harrington et 1997; Cox, 1999; 2006) for /hVd/,

/hVt/ and /hV/ contexts separately. You MUST use the standard procedure for plotting that is used in these publications. Plots can be generated in Excel using the Scatter Plot function. You will have to reverse the axes to create a plot with the correct orientation. Plot /e:/ on the monophthong plot.

6. On a separate graph, plot the schematic trajectories of the front rising diphthongs /æ? ?e o?/ superimposed onto a copy of the relevant monophthong vowel space generated above. Schematic trajectories are straight line estimates of diphthong movement through the vowel space from target 1 to target 2 (see Cox, 1999). Use arrows to indicate the direction of the movement.

7. On another separate graph, plot the schematic trajectories of the back rising diphthongs /æ? ??/ superimposed onto a copy of the relevant monophthong vowel space generated above for each context. You can plot /??/ on this graph too.

8. Plot the durations for each vowel in the /hVd/, /hVt/ and /hV/ contexts.

9. Compare the /hVd/, /hVt/ and /hV/ formant spaces, diphthong trajectories and durations.

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"A Study On Vowel Production And Alterations Of English Speakers In Western Sidney." My Assignment Help, 2021, https://myassignmenthelp.com/free-samples/sph399-the-acoustics-of-speech/vowel-space-analysis.html.

My Assignment Help (2021) A Study On Vowel Production And Alterations Of English Speakers In Western Sidney [Online]. Available from: https://myassignmenthelp.com/free-samples/sph399-the-acoustics-of-speech/vowel-space-analysis.html
[Accessed 22 September 2023].

My Assignment Help. 'A Study On Vowel Production And Alterations Of English Speakers In Western Sidney' (My Assignment Help, 2021) <https://myassignmenthelp.com/free-samples/sph399-the-acoustics-of-speech/vowel-space-analysis.html> accessed 22 September 2023.

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