Table 2.

The impact of accents on different speech recognition models.

Model classification	Model characteristics	Models composition	Impacts
Traditional speech recognition models	Training and optimizing the acoustic model and language model separately	Acoustical model	Changes in acoustic features
		Language model	Lead to changes in vocabulary usage and order, making it more challenging for language models to understand.
End-to-end speech recognition models	From acoustic features to integrated text	Encoder-decoder	The degradation of speech recognition generalization and adaptability