中大型空間如體育場館、游泳池、會議中心、購物中心、工廠等場所，往往因為大容積及表面材質設計，而有迴響過長導致環境嘈雜以及使用者聽覺上不舒適等問題，然而，此類型空間受限於使用情境，地板及牆面不便於施作吸音材質，一般多由天花板材質著手，常見的方式有平面式吸音天花板或懸吊式空間吸音體。
本研究以空間吸音體中之垂直吸音障板為研究對象，第一階段依據CNS 9056（ISO 354）於迴響室進行試體之吸音測試，探討多孔質及金屬盒狀吸音障板的吸音特性及性能因子，開發出可針對低頻帶吸音的金屬盒狀吸音障板，以其框體厚度、複層與否、分層比例、隔板材料和摺板摺數等構造參數為操作變因，討論金屬盒狀吸音障板的單元性能，並以廣義邏輯函數分析多孔質及金屬盒狀吸音障板排列間距與單元性能和單位投影面積性能的關係。第二階段以國立成功大學中正堂為應用吸音障板的模擬空間，以Odeon進行空間聲學模擬，確認基本空間模型的再現性後，再進行配置吸音障板的各方案模擬，依據模擬結果，討論於大空間中的吸音障板應用建議。
研究結果顯示框體厚度是影響金屬盒狀吸音障板性能的關鍵因子，框體厚度30 cm及20 cm的組別可作為針對100及125 Hz的低頻吸音器，將其內部分層時，採用金屬擴張網隔板比實心鋁隔板佳，可以提升部分中高頻帶的性能，且分層比例越接近對分越好，框體厚度30 cm組別125 Hz的吸音係數都在0.6-0.8之間，於100 Hz亦可達到0.4-0.7。有別於需要固定在牆面或天花板等背櫬面上的低頻共振吸音體，金屬盒狀吸音障板得以單元形式自由吊掛，在解決低頻問題的同時兼顧空間設計的自由度。
吸音障板的單元性能隨著排列間距增加而提升，障板高度2-2.5倍以下之間距為線性區段，其上為漸進區段；單位投影面積性能則隨著排列間距增加而下降，障板高度1.5-2倍之間距為緩降區段，此範圍外為陡降區段。越接近吸音峰值頻帶，受間距變化的影響越顯著，但與低頻帶性能較無關聯或特定趨勢。Odeon模擬結果顯示障板總表面積對排列間距與迴響時間的相對趨勢較無影響，但吸音障板表面積的增減主導迴響時間的變化，無論配置深淺疏密，若表面積接近，則吸音效果相似；障板裝設於中央區域比外圍區域有效，混用金屬盒狀吸音障板可使125 Hz迴響時間降至2.5 s以下。

Large spaces are often designed with large volume and sound reflective surface material, which causes an uncomfortable hearing environment. However, in this type of venue is difficult to apply sound-absorbing materials on the floor or walls due to space utilization. Ceiling materials, including horizontal sound-absorbing ceilings and suspended space absorbers, are common methods to improve it. Sound-absorbing baffles are an economical type of space absorbers usually used to absorb high-frequency sound.
The research takes vertical sound-absorbing panels named absorbing baffle, including porous baffles and micro-expanded metal mesh (MEMM) box absorbers, as the research object. In the first stage, MEMM box absorbers that can absorb low-frequency sound were developed, and their structural parameters were studied. The relationship between the row distance and the performance of baffles was analyzed with a generalized logistic function. In the second stage, the Zhong Zheng Hall in NCKU was simulated with Odeon for the application of absorbing baffles.
The research results show that the frame thickness is a key variable affecting the performance of MEMM box absorbers and the absorption peak is at 100 or 125 Hz with a frame thickness of 30 and 20 cm. The MEMM partition is better than the solid aluminum partition. Partitions can improve the performance of mid-to-high frequency bands and the closer the partition ratio is to 1:1, the better the performance is. The absorption coefficient can reach 0.6-0.8 at 125 Hz and 0.4-0.7 at 100 Hz.
Unit performance of a baffle increases with distance, whose linear segment is less than 2-2.5 times the height of baffles, and above is the progressive segment. By contrast, unit projected area performance decreases with distance, whose gentle segment is 1.5-2 times the height of baffles. Performance at a frequency close to the absorption peak is more affected by the distance, while the low-frequency band is less affected. The simulation results demonstrate that the reverberation time has a linear relationship with the row distance and the frequency band with higher sound absorption is less affected by the distance. The total surface area of baffles dominates the change of the reverberation time. However, it is more effective to install the baffle in the central area than in the peripheral area.

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