About OKAWA HEIICHIRO
About 住環境総合研
About environment in building
About noise damage
About acoustical design
About sound environment
About claim management
About multiple dwelling house
About environmental noise
About external wall
About ventilating opening
About railroad noise
About walking
About floor impact sound
About door
About noise measurement(pollution)
About psychological effect
About human relations
About life(livelihood)
About origin
About life sound
About Sound-proofing,sound-insulation of buildings
About Residential buildings,rural buildings,castles
About 建築環境
About 音
About トラブル
About 対処
About 設計法
About 音環境
About 訴訟
About 集合住宅
About 苦情
About 発生要因
About 現状