@techreport{weko_222110_1, author = "Thilina,Dissanayake and 前川,卓也 and 原,隆浩", title = "Preliminary Investigation of Employing Smartphone Active Sound Sensing to Predict Distance and Relative Velocity of the Roadside Obstacles to Aid Distracted Pedestrians", year = "2022", 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 = "25", month = "nov" }