Estimating Speaker Scale Factors from Vowels

D. J. Nelson, D. C. Smith, S. Umesh, L. Cohen

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


In previous works, Umesh et al, demonstrated that phonetically similar vowels spoken by different individuals are related by a simple translation in a universal warped spectral representation. They experimentally derived this function and called it the "speech-scale". We present further experimental evidence, based on a large data set, validating the speech-scale. We also estimate speaker-specific scale factors based on the speech-scale, and we present a vowel classification experiment, which demonstrates a significant performance improvement through a normalization based on the speech-scale. The results we present are based on formant estimates of vowels in a Western Michigan vowel database.

Original languageEnglish
Pages (from-to)794-800
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue number2
StatePublished - 2003
Externally publishedYes
EventWavelets: Applications in Signal and Image Processing X - San Diego, CA, United States
Duration: Aug 4 2003Aug 8 2003


  • Cross-spectrum
  • Formant estimation
  • Speaker scale
  • Spectral correlation
  • Spectral estimation


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