由於西方文化的入侵，傳統中國國樂演奏已進入西方的音樂廳堂演出，而大多數廳堂主要是依據西洋樂音聲學特性來進行設計。Morimoto and Maegawa（1989）提到聲場的空間印象是心理音響重要的特性之一，而聆聽者的空間印象是由聲源寬廣度與包被感所組成。Ando（1983）則認為空間聽性反應皆源自於大腦雙耳之訊號互函數計算而來。因此，本研究將以中國國樂與西洋管弦樂之聲學空間特性差異作為研究主題，以導向空間建築設計。主要研究內容歸納成以下三個：（1）中西傳統樂器聲源寬廣度差異；（2）迴響時間對中西傳統樂器聲源寬廣度的影響；（3）雙耳互函數對中西傳統樂器聲源寬廣度的影響。實驗方法是以不完備配對比較法進行中西樂音之聆判，求得不同條件下中西傳統樂器之主觀聲源寬廣度的心理量化尺度。實驗結果發現：（1）西洋管弦樂之主觀聲源寬廣度明顯高於中國國樂（p＜0.001），並依Thurstone（1927）之心理量化尺度得到各樂器之寬廣度排序：大提琴＞法國號＞小提琴＞單簧管＞揚琴＞古箏＞低音管＞中阮＞笛管＞二胡；（2）西洋管弦樂器的樂音聲源寬廣度隨著迴響時間的增長而有顯著的增加（p＜0.001），但是中國國樂改變的增加趨勢則不顯著；（3）當雙耳互函數級數較小時，主觀聲源寬廣度之心理尺度越大，兩者呈負相關的趨勢（p＜0.001）。

Due to the invasion of Western culture, traditional Chinese music had been played in the Western concert hall which is mainly designed in accordance with the acoustic characteristics of Western musical instruments. Morimoto (1989) proposed that the spatial impression of sound field is one of the most important characteristics in the psycho- acoustics, and that the spatial impression is composed of apparent source width (ASW) and listener envelopment (LEV). Ando (1983) suggests that spatial impression of sound field is derived from the evaluation of magnitude of inter-aural cross correlation (IACC). A topic titled on differences between traditional Chinese and Western musical instruments was surveyed in this study. The primary purposes are: (1) different responses for ASW between the traditional Chinese and Western musical sounds; (2) the influence of the reverberation on ASW; (3) the effects on ASW caused by IACC of sound field. The methodology in this study is to utilize the paired comparisons with incomplete data, the responses of the Chinese music source and the Western musical sound, in order to acquire the psycho-scale values (SVs) of ASW perceived subjectively by way of changing physical conditions. The findings of the experiments are: (1) The SVs of ASW of the Western music is obviously larger than that of the traditional Chinese musical sound (p＜0.001), and the order of all musical instruments are ranked according to Thurstone's case V theory: cello > French horn > violin > clarinet > dulcimer > Chinese zither > bassoon > ruan > pipe > erhu; (2) Only ASW of Western musical sounds increases as the reverberation time has been grown (p<0.001); (3) When IACC of sound field decreases, the ASW of both the traditional Chinese and Western musical sounds significantly drop.