Principal components analysis

[Stuart Rosen <stuart@xxxxxxxxxxxxxxxxxxx>]

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A number of workers in the Netherlands used principal components
to great effect on vowel spectra in the 60's and 70's. These
are reviewed in brief (along with the psychoacoustical background)
on pp 427-431 of:

Rosen, S. & Fourcin, A.J. (1986) Frequency selectivity and the
      perception of speech.  In: Frequency Selectivity in Hearing,
      ed. B.C.J. Moore.  London: Academic Press, pp 373-487.

The main papers I know about are (although perhaps not the last 2 - I'm
just not sure):

Pols, L. C. W., Kamp, L. J. Th. van der, and Plomp, R.
     (1969).  Perceptual and physical space of vowel
     sounds, J. Acoust. Soc. Am., 46, 458-467.
Plomp, R., Pols, L. C. W. and Geer, J. O. van der (1967).
     Dimensional analysis of vowel spectra, J. Acoust. Soc. Am.,
     41, 707-712.
Klein, W., Plomp, R., and Pols, L. C. W. (1970).  Vowel spectra,
     vowel spaces and vowel identification, J. Acoust. Soc. Am.,
     48, 999-1009.
Nierop, D. J. P. J. van, Pols, L. C. W. and Plomp, R. (1973).
     Frequency analysis of Dutch vowels from 25 female speakers,
     Acustica, 29, 110-118.
Pols, L. C. W., Tromp, H. R. C. and Plomp, R. (1973). Frequency
     analysis of Dutch vowels from 50 male speakers, J. Acoust.
     Soc. Am., 53, 1093-1101.

Yours - Stuart Rosen