@techreport{weko_212492_1,
   author	 = "Thilina,Dissanayake and 前川,卓也 and 原,隆浩",
   title	 = "Preliminary investigation of obstacle recognition via smartphone active sound sensing for pedestrian safety",
   year 	 = "2021",
   institution	 = "Graduate School of Information Science and Technology, Osaka University, Graduate School of Information Science and Technology, Osaka University, Graduate School of Information Science and Technology, Osaka University",
   number	 = "21",
   month	 = "aug"
}