This study aims to examine the effectiveness of the PRAAT application in improving students' pronunciation, focusing on close mid vowels, plosive consonants, and fricative consonants. Pre-test and post-test data were collected from 50 participants to evaluate changes in pronunciation after the intervention using PRAAT. The average spectrum deviation in the pre-test was 24.5%, which decreased to 14.3% in the post-test, with a total gain of 10.2%. This significant reduction indicates an improvement in pronunciation, approaching the standard of native speakers in the analyzed phoneme categories. Statistical analysis revealed a significant change with a p-value < 0.001, affirming that PRAAT plays a crucial role in enhancing students' pronunciation quality. These findings provide empirical evidence that PRAAT is effective as a tool for improving the pronunciation of specific phonemes in language learning and recommend its broader application in educational contexts.