NON-NATIVE CHILDREN SPEECH RECOGNITION THROUGH TRANSFER LEARNING
Table 7: Results (WERs) using mono and multi-lingual acoustic models; the off-diagonals numbers represent WERs obtained on non-native speech.
['speakers ∖ language', 'Italian', 'German', 'English']
Nevertheless, the multi-lingual system shows more robustness against non-native speech: the off-diagonals WERs, that represent the performance for young students speaking a foreign language, are significantly lower when the target language is English (39.8% against 53.2 and 31.7 against 40.4) whilst it similar in case of German (i.e. 18.5% against 17.4%).