Abstract
This paper describes a summary of acoustic analysis systems for speech CALL systems. First, speech signal recording and processing systems using a personal computer are described. In particular, a USB sound unit is strongly recommended for high quality recording. Furthermore, the concept of acoustic analysis methods and several software programs for acoustic analysis and speech recognition are introduced. Finally, several speech CALL systems using the programs are roughly explained. Using a speech recognition and acoustic analysis program, it is very easy to point out errors in pronunciation, intonation and rhythm for learners.
