ISCA Tutorial and Research Workshop on Experimental Linguistics (ExLing 2008)

Athens, Greece
August 25-27, 2008

The Effects of the Acoustic Properties of Second Language Vowel Production on Pronunciation Evaluation

Chris Sheppard

Faculty of Science and Engineering, Waseda University, Japan

This study examines the acoustic characteristics which native speakers use as cues when judging speech samples. 17 words produced by 98 (15 native speakers and 83 Japanese learners of English) were collected and evaluated. Following this, the first three formants for each vowel produced were measured and used as independent variables in stepwise multiple regression analyses to explain variance in the evaluations. The results demonstrated that the formants did explain variance in evaluation in many but not all of the words (r² = 0.0 to .36).

Full Paper

Bibliographic reference.  Sheppard, Chris (2008): "The effects of the acoustic properties of second language vowel production on pronunciation evaluation", In ExLing-2008, 201-204.