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Vowel Distinction at High Frequencies

Explore if vowels shift on chart at high frequencies. Record Icelandic vowels at 5 pitches using a piano reference. Analyze spectrograms & formants to map vowel space. Results suggest vowels tend to converge at higher frequencies.

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Vowel Distinction at High Frequencies

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  1. Vowel Distinction at High Frequencies • Hermann Ingi Ragnarsson

  2. The Purpose To find out if vowels move closer to each other on a vowel space chart when they are sung at higher frequencies.

  3. The Method • I recorded the singing of the Icelandic vowels a, e, í, o, ú at 5 different frequencies. • I used a piano for reference. Playing five different keys. After each key was pressed the singer would sing the vowels.

  4. The Piano Keys that Were Used • Middle-C, E, G, C(one octave higher) and E (one octave higher)

  5. Middle C - Spectrogram

  6. Middle C - Formants

  7. E - Spectrogram

  8. E - Formants

  9. G - Spectrogram

  10. G - Formants

  11. C (higher) - Spectrogram

  12. C (higher) - Formants

  13. E (higher) - Spectrogram

  14. E (Higher) - Formants

  15. Vowel Space Charts

  16. Middle C

  17. E

  18. G

  19. C (Higher)

  20. E (Higher)

  21. Conclusion Despite showing instances of unpredictable ‘behavior’ the vowels generally move closer to each other on the vowel space chart with increasing frequencies.

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