The study examaines changes in a native Malaysian’s pronunciation of word stress, vowel length and consonant clusters before and after she was tranined. Jeong & Thorén (under review) showed that this training made the speaker’s pronunciation more intelligible to native Swedish listeners. We look at the changes on an acoustic level by measuring vowel duration, word duration, f0 patterns and realization of consonant clusters. The result shows that, after training, her pronunciation improved in all the three aspects. The improvement was audible as well as measurable with acoustical changes in absolute and relative vowel duration and realization of consonant clusters. Word stress patterns were also improved but with less clear-cut acoustic correlates.