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題名 | 鞋盒型廳堂觀眾席音響性能擴散性之探討=Diffusion in Shoe-Box Concert Halls |
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作者姓名(中文) | 江維華; 吳惠萍; | 書刊名 | 中華民國音響學刊 |
卷期 | 8:1 2001.06[民90.06] |
頁次 | 頁17-29 |
分類號 | 334.5 |
關鍵詞 | 鞋盒型音樂廳; 擴散性; Shoebox concert hall; Diffusion; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以鞋盒型廳堂( 2000 席 18500m�纂^為對象探討音場擴散性,電腦模擬就 音強指數( G )與側向音能分數( LF )探討不同樓座構成下各測點間數值的差異性, 縮 尺模型( 1/20 )則就後期雙耳互相關係數( IACC �窀纂^、回音指標( EK )與時間閾擴 散( TD )探討舞臺區擴散材配置下各測點的擴散性。電腦模擬發現無側樓座模型各點間 G 值差異小於有測包廂者,側樓座(包廂)並沒有提昇 LF 的效果。縮尺模型試驗顯不使用擴 散材(特別是在天花板或側牆)對樓座下測點的音強有提昇的作用,此外天花板縱向與側牆 垂直的配置能降低 IACC �窀躁ぉ�,邊牆配置擴散材對降低 TD 與 EK 的數值都有效果,本 研究成果可做為設計當代鞋盒型廳堂的參考。 |
英文摘要 | Analysis using computer models and 1:20 scale models were made regarding the influence of balcony design and diffusers on sound diffusion in a shoebox concert hall (2000seats/18500 m �� ). Diffusion was evaluated regarding temporal and directional distribution of acoustical energy at individual seats as well as energy distribution over seats. The computer model without side balconies yeilded less among-seat differences of strength (G) factor than did the ones with side balconies. The G values at the seats under balcony was increased by placing diffusers on ceiling or side walls of the stage. The hall average values of late inter-aural cross correlation (IACC �窀� ) were reduced by using transversal diffusers on ceiling or longitudinal diffusers on side walls. Diffusers around the stage were effective in reducing both temporal diffusion (TD) and echo criteria (EK) values for the seats near side walls. The results of the research can be used as a reference for designing modern shoebox halls. |
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