2001-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/698670摘要：本計畫擬探討多孔質吸音材貼附於隔音板時之吸音與隔音效果及增進隔音性能之可行性，在計畫中將多孔質吸音材視為彈性結構,利用Biot之理論，推導有限厚度多孔質吸音材內部兩側流體壓力、速度與固體結構應力、速度之矩陣傳輸關係，再將此關係式配合與空氣接觸面之邊界條件以及板之振動方程式與接觸面上應力與速度之條件，推導出聲波斜向入射此一材料之透過波與反射波之大小，從而獲知吸音與隔音性能。在文中將進行吸音係數與透過損失之實驗量測，以驗證理論分析之正確性。最後則將進行多孔質材疊層及各參數對吸音與隔音性能影響之探討。<br> Abstract: The purpose of this project is to investigate the sound absorption and insulation characteristics of a panel combined with porous material. In this project the frame of porous material is regarded as elastic structure. By Biot’s theory two coupled equations for sound propagation in porous material can be obtained. Three waves, two compression waves and one shear wave, exit in elastic porous material can be solved. Therefore, we can deduce the transfer matrix for the stress and velocity between t聲音多孔質材穿透吸音acousticporous materialtransmissionabsorptio