6. 還土ブロック界壁を適用した応接室における空間性能
-騒音レベルと2 室間の室間平均音圧レベル差による空気音遮断性能-
Spatial performance in the drawing room with the return soil block boundary wall applied
-A-Weighted Sound Pressure Level and Airborne sound insulation by averaged Sound Pressure Level difference between two rooms-