ABSTRACT
This study aims at finding intonation patterns of utterances produced by speakers with Autism Spectrum Disorder (ASD). The acoustic units used to mark the intonation pattern are: 1) pitch movement, 2) final intonation, and 3) baseline slope. The data were uttered sentences in declarative and interrogative modes produced by 11-year-old children with ASD and TD (Typical Development). This is an experimental research using an IPO approach and a PRAAT program to analyse acoustic data. Based on real contour utterance patterns produced by the speakers with ASD and TD, the synthesis and substitutions of pitch movement between the ASD and TD intonations were made. The stimuli of pitch movement synthesis and substitution were then tested to know the meaning of acceptability through perception test and statistics using the Likert scale. The perception test results show that the speakers with ASD did not produce different utterance intonation between declarative and interrogative modes. The pitch movement, in both declarative and interrogative modes tends to be flat and show a pitch range under three semitones.
