聲激勵隔音板非共振傳遞分析

Sound Transmission of Double and Triple Leafs Using Statistical Energy Analysis

在分析聲音穿透隔音材的問題時，統計能量法是常採用的分析方法，在處理板結構被聲激勵時，傳統的統計能量法，無法考慮結構非共振振型的影響，本文建立修正的統計能量模型，對被聲激勵的雙層隔音板之結構響應，分別預估其共振與非共振振型的結構響應，進一步建立雙層與三層隔音板，修正的統計能量數值模型，分析受到音源室聲激勵的板結構，其共振與非共振響應，以及聲音輻射至受音室的聲壓值，結果顯示以傳統的統計能量模型進行分析雙層與三層隔音板，在預估板結構響應以及受音室的聲壓值上，會產生明顯的誤差。 Although SEA is a suitable framework for predicting sound transmission through double leafs, it has been found that when excited acoustically, conventional SEA does not predict the non-resonant response of structure. In this paper, sound transmission through double-leaf and triple-leaf partitions is considered. Two modified SEA models have been construct to study sound transmission through different partitions. It is found that it can be lead to significant errors if the non-resonant part is not considered.