About NAKAGAWA KIYOSHI
About 建築音響共同研究機構
About architectural acoustics
About sound insulating material
About acoustic structure
About sound insulation
About performance
About dependence
About specific gravity
About porous medium
About multistory structure
About concrete
About laminated plate
About flat glass
About frequency dependence
About sound transmission loss
About sound insulation countermeasure
About sound insulation structure
About sound insulation performance
About thickness dependency
About mass dependence
About porous material
About window glass
About Sound-proofing,sound-insulation of buildings
About Propagation of sound waves
About 防音
About 建築
About 遮音構造
About 遮音