About FUJIWARA KYOJI
About OKUBO TOMONAO
About sound insulation wall
About road traffic noise
About edge
About morphology (form)
About point sound source
About sound absorbing material
About frequency characteristic
About acoustic wave interference
About separator (plate)
About numerical analysis
About noise control
About suppression and control
About Road traffic noise and vibration
About 遮音壁
About 道路交通騒音