Key points are not available for this paper at this time.
This study was designed as a replication and extension of the classic study of vowel acoustics by Peterson and Barney (PB) J. Acoust. Soc. Am. 24, 175–184 (1952). Recordings were made of 50 men, 50 women, and 50 children producing the vowels /i, i, eh, æ, hooked backward eh, inverted vee), a, open oh, u, u/ in h–V–d syllables. Formant contours for F1–F4 were measured from LPC spectra using a custom interactive editing tool. For comparison with the PB data, formant patterns were sampled at a time that was judged by visual inspection to be maximally steady. Preliminary analysis shows numerous differences between the present data and those of PB, both in terms of average formant frequencies for vowels, and the degree of overlap among adjacent vowels. As with the original study, listening tests showed that the signals were nearly always identified as the vowel intended by the talker.
Hillenbrand et al. (1994) studied this question.