Toshiya Nakakura Yasuyuki Sumi Toyoaki Nishida Neary: conversation field detection based on similarity of auditory situation. 2009 HotMobile http://doi.acm.org/10.1145/1514411.1514423 conf/wmcsa/2009 db/conf/wmcsa/hotmobile2009.html#NakakuraSN09