Procedure
The speech articulation test material consists of 25 disyllables that are common in children’s daily lives. The target disyllable is written on a card with a vivid picture, and the child was asked to name the picture in the card alone or under guidance. Each of the disyllables was repeated three times. The raters and children were seated on the opposite side of each other around a table. They wrote down what they heard and were also asked to mark every unintelligible word with a cross. The speech intelligibility score was averaged across the four raters and obtained by traditional evaluation is marked as SISTE (Intelligibility Score of Traditional Evaluation). At the same time, an iPhone equipped with iFly software was placed 20 centimeters directly in front of the child in a quiet environment. The speech recognition system recorded the pronunciation of the child and then output the text. The speech intelligibility score of the ASR system is marked as SISASR(Intelligibility Score of ASR system ) and is based on the correctness of the output text.