“…As an effort to adapt acoustic models, several interpolation methods have been proposed, where two sets of acoustic models, the acoustic models trained with the target language and the acoustic models trained with the mother tongue of native speakers, are combined (Matsunaga et al, 2003;Steidl et al, 2004;Tan et al, 2007). Contrary to interpolating acoustic models, phone acoustic models of the target language were modified by adding an alternative path to the corresponding mother tongue phone acoustic models of non-native speakers (Bartkova et al, 2006;Bouselmi et al, 2006).…”