A New Vowel Normalization for Sociophonetics

Research output: Contribution to conferenceAbstractScientific


Several studies have shown that in sociophonetic research Lobanov’s speaker normalization method outperforms other methods for normalizing vowel formants of speakers. An advantage of Lobanov’s method compared to the method that was introduced by Watt & Fabricius in 2002 is that it is independent of the shape of the vowel space area, and also normalizes to the dispersion of the vowels. However, it does depend on the distribution of the vowels within the vowel space. When using Lobanov normalization the formant values are converted to z-scores. We present a method where the µ in the z-score formula is replaced by the center of the convex hull that encloses the vowels, and the σ is obtained on the basis of the points that constitute the convex hull. When normalizing measurements of two real data sets, and of a series of randomly generated data sets, we found that our method improved in matching vowel spaces in size and overlap.
Original languageEnglish
Publication statusPublished - Dec 2021
EventInterspeech 2021 - Brno, Czech Republic
Duration: 30 Aug 202103 Sept 2021


ConferenceInterspeech 2021
Country/TerritoryCzech Republic
Internet address


  • vowel formants
  • vowel space
  • normalization
  • sociophonetics


Dive into the research topics of 'A New Vowel Normalization for Sociophonetics'. Together they form a unique fingerprint.

Cite this