For children's ASR, word error rates are driven most by utterance length and child age, then noise and pronunciation, and fine-tuning lowers age sensitivity but not length sensitivity.
Spectral Modification Based Data Augmentation For Improving End-to-End ASR For Children’s Speech,
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Causal Analysis of ASR Errors for Children: Quantifying the Impact of Physiological, Cognitive, and Extrinsic Factors
For children's ASR, word error rates are driven most by utterance length and child age, then noise and pronunciation, and fine-tuning lowers age sensitivity but not length sensitivity.