To investigate the influence of regional and social backgrounds on voice quality of speakers, LTAS (long-term average spectra; drawn from 21 readings of an invariant text and 25 interviews were compared by means of SDDD dissimilarity index The results tentatively suggest correlation with major geographical divisions on the British Isles, More impressive are SDDD values drawn from comparisons of middle class, urban working class LTAS data. In search of more informative frequency bands data for regional and social groups identification. the ratio between two major areas under the curve was introduced, and the results were assessed with regards to socially acceptable cultivated voice quality. The communicative value of situational LTAS variability was tested In experiments with two speakers performing a number of social roles.
Bibliographic reference. Shevchenko, T. I. / Skopintseva, T. S. (1991): "Effects of social and regional backgrounds on LTAS in british English", In EUROSPEECH-1991, 169-172.