Formant frequency information for vowels averaged across 24 male speakers.
A data frame with the following columns:
- A factor indicating speaker sex.
- The vowel category in x-sampa.
- A numeric vector indcating the vowel F1 in Hz.
- A numeric vector indcating the vowel F2 in Hz.
- A numeric vector indcating the vowel F3 in Hz.
Pols, L. C. W., Tromp, H. R. C., & Plomp, R. (1973). Frequency analysis of Dutch vowels from 50 male speakers. Journal of the Acoustical Society of America, 53. 1093-1101.
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