Novel application of microphone array sensor for children's language learning support - Intelligent Interactive Design using voice separation and recognition system -. - Takahiro Nakadai; Motohiko Hano; Hiroshi Mizoguchi; Ryohei Egusa; Etsuji Yamaguchi; Shigenori Inagaki; Yoshiaki Takeda; Miki Namatame; Masanori Sugimoto; Fusako Kusunoki (ICST, 2015)