Computer-assisted instruction(CAI) system by use of the internet for self-teaching of pronouncing the Chinese tones

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The pattern of change in voice pitch is used as visual cues in the computer-assisted instruction(CAI) system by use of the internet for self-teaching of pronouncing the Chinese tones. For the visual display, fifteen kinds of combinations of the four tones in standardized voice pitch patterns of disyllabic words were drawn on the musical scale with six whole tones, and presented along with the measured voice pitch pattern of the speech samples. For the speech samples, the disyllabic word lists pronounced only with voiced sound source were edited, and the measured voice pitch patterns not interrupted by unvoiced consonants were presented. These visual displays made easier for the beginners to perceive the tonal features.