Nominal male vowel speech sounds and first three formant frequencies

After G. E. Peterson and H. L. Barney, "Control methods used in the study of the Vowels," Journal of the Acoustical Society of America, vol. 24, pp. 175-184, 1952. From P. R. Cook (ed.), Music, Cognition, and Computerized Sound, MIT Press, 1999; Chapter 11, Pr. R. Cook, ``Formant Peaks and Spectral Valleys.''

Symbol       Reference word      F1     F2     F3  (Hz)
/i/              beet           270   2290   3010 
/I/              bit            390   1990   2550
/e/              bet            530   1840   2480
/ae/             bat            660   1720   2410
/a/              father         730   1090   2440
/aw/             bought         570    840   2410
/U/              book           440   1020   2240
/u/              boot           300    870   2240
/L/              but            640   1190   2390
/r/              bird           490   1350   1690