It has been argued that bark-scale transformed formant frequency values more accurately reflect auditory representations of vowels in the perceptual system than do the absolute physical values (in Hertz). In the present study the perceptual features of 15 monophthongal and diphthongal vowels (obtained using multidimensional scaling) were compared with both absolute and bark-scale transformed acoustic vowel measures. Analyses suggest that bark-transformation of the acoustic data does not necessarily produce better predictions of the vowels' perceptual space.
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