辨識目標聲源的位置和提高聲源清晰度是聲訊處理的主要目標之一，本研究目的是在未知目標聲源位置的情況下，可立即以聲訊處理接收到的訊號判斷目標聲源的位置並達到還原聲源訊號的效果。其中研究主軸是將五支麥克風放置於固定陣列中，以三角聲源定位法判斷聲源位置，並結合時間反轉法(Time Reversal Method, TRM)達到還原聲源訊號的效果。時間反轉法為基礎的聲源還原技術，主要是利用回傳時間反轉之聲波訊號，藉由聲波滿足互易性原理(Reciprocity)及線性波動方程式的不變性，補償因多重路徑傳遞與傳遞介質不均勻所造成的訊號失真，使訊號得以聚焦於原聲源位置。TRM在運用上，需要利用麥克風陣列接收到的訊號和原始聲源訊號以求得環境脈衝響應函數(Impulse Response Function, IRF)，在未知聲源的情況下，則必需在聲源位置放置麥克風才能得到原始聲源訊號。本論文則是將麥克風陣列以三角定位法固定位置擺放，將陣列接收到的欲還原的聲源訊號以交互相關(Cross-Correlation, CC)計算各訊號間的到達時間差(Time Difference of Arrival, TDOA)，再帶入以三角定位法原理推導出的聯立方程式得到聲源位置。以此聲源位置利用球面波定理計算自由聲場下的IRF，利用此計算IRF的方法取代需要預先知道原始聲源訊號或是使用聲源位置的麥克風量測原始聲源訊號計算IRF的方法，最後將得到的自由聲場IRF以時間反轉法計算步驟得還原的聲源訊號。實驗第一部份先探討聲源定位法的精準度；第二部分以原TRM 和結合聲源定位的TRM兩者的IRF依時間反轉法處理後的聲源訊號與實際聲源位置之接收端的訊號各做相關度比較，探討結合前後的還原聲源效果。原TRM的結果為提升接收訊號30%與聲源的相關度，本論文定位法結合TRM的結果提升接收訊號9.6%與聲源的相關度，但不需事先知道聲源位置和聲源訊號並可快速的計算得到該聲源位置的IRF後，即可得到聲源還原的效果。

This study explored the target sound source location at unknown situation and processed the received signal to determine the location of the target, including the reconstructed signal of source immediately. In this paper, it used triangulation sound sources localization and time reversal method (TRM) to reconstruct the source signals. The purpose is to use a sound source localization method with a simple device to quickly locate the position of the sound source. This method uses the microphone array to measure signal from the target sound source. Then, the sound source location is calculated and is indicated by Cartesian coordinates. The sound source location is then used to evaluate free field impulse response function which can replace the impulse response function used in time-reversal method. This process reduces the computation time greatly which makes possible for a real time source localization and source signal separation.

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