Effects of speech rate, phonetic background and gender on vowel reduction in the speech of nonnative speakers of English

Abstract

The paper reports the results of a study investigating vowel reduction in the speech of non-native speakers of English. The aim was to unravel the links between reduction and speech rate, phonetic training and gender. We hypothesized that (i) Polish speakers of English reduce vowels; (ii) they speak slower than native speakers; (iii) the higher the rate, the higher the reduction degree; (iv) speakers with phonetic training reduce less than those lacking it; (v) male subjects reduce more than the female ones.In order to realize these aims, an acoustic analysis of vowels was performed on 2 hrs 42 mins of speech produced by 12 Polish speakers of English. The subjects were divided into an experimental group consisting of 6 students of English and a control group with 6 speakers who had no phonetic training.The obtained results positively verify that non-native speakers reduce vowels and cast some doubts on whether they speak slower than native speakers. The role of rate and gender could not be established due to statistical and methodological issues. The group with no phonetic training outperformed the group which underwent phonetic training, pointing instead to the role of exposure and perhaps music training in acquiring native-like reduction patterns.