穿孔鋼板為業界廣泛採用之吸音材料，而一般在設置時大多引用國外的文獻與資料，缺乏針對穿孔鋼板吸音特性的實驗與測試，顯示國內對於穿孔鋼板吸音材料之吸音力要求程度，以及穿孔鋼板相關資訊仍未普及。
本研究探討影響穿孔鋼板吸音特性之變因，包括穿孔率、背貼材質及背後空氣層厚度。本研究並釐清穿孔鋼板共振頻率預測式之適用性，藉以掌握穿孔鋼板之共振頻率，並初步建立穿孔鋼板吸音特性之數據與資料。
本研究所得之結論有以下幾點：
一、在相同板厚、相同穿孔率下，金屬類穿孔板中鋼板與鋁板材質之吸音率差值小於0.04，顯示鋼板與鋁板材質變化對吸音率並無顯著影響。
二、在相同板材質下，無穿孔與有穿孔形成不同之吸音率曲線，無穿孔板呈現板振動吸音特性，有穿孔則為共振吸音特性。
三、穿孔鋼板固定背後空氣層厚度、背貼材質種類之因素，隨穿孔率加大(由8.7%至17.5%)而共振頻率愈高；其吸音率之差值均小於0.15，差異並不顯著。
四、穿孔鋼板背後空氣層厚度愈大，吸音率隨空氣層厚度增加而增大；而共振頻率愈低，顯示空氣層厚度增加有助於增大低頻吸音。
五、穿孔鋼板背貼吸音材料其平均吸音率較無背貼時至少增加0.12以上，增加量最高可達0.75，顯示背貼吸音材質均較無背貼吸音材質之吸音為佳，穿孔鋼板除留設空氣層外，尚需背貼吸音材質才能獲致較佳之吸音特性。
六、穿孔鋼板背貼複合吸音材料較背貼單獨吸音材料具有較大之平均吸音率。

Perforated steel panels are widely used as sound absorption materials in architectural field. However, the setup always follows the overseas information and lacks experiments and tests on the sound absorption characteristics of perforated steel panels. It shows that in our country, not only the requests of sound absorption ability but also the related information of perforated steel panels are unavailable.

This research discusses all factors affecting the sound absorption characteristics of perforated steel panels, including perforation, backing materials, and air space. This research aims to figure out the suitable prediction formula for resonant frequencies of perforated steel panels, and to collect the statistics and data as well.

There are some conclusions as follow:

1.For the same thickness and perforation, the difference of sound absorption coefficients between perforated steel panels and perforated aluminum panels is below 0.04. With steel or aluminum panels, the changes of metal materials show no obvious effect to sound absorption coefficients.

2.With the same material, panels with perforation have different curves from those with no perforation. None-perforated panels present sound absorption characteristics of panel vibration, while perforated panels present resonant sound characteristics.

3.With fixed air space and backing materials, the more the perforation is (from 8.7% to 17.5%), the higher the resonant frequency goes. All the differences of sound absorption coefficients are below 0.15, which are not quite big.

4.The larger the air space is, the higher the sound absorption coefficients are, and the lower the resonant frequency would be. It shows that the air space would increase low frequency sound absorption.

5.The average sound absorption coefficients of perforated steel panels backing with sound absorptive material are greater than those backing with no sound absorptive materials by 0.12 at least, and 0.75 at most. It shows that in addition to setting air space, perforated steel panels would gain better sound absorption characteristics when backing with sound absorptive materials.

6.Perforated steel panels backing with complex sound absorptive materials have higher sound absorption coefficients than those backing with single sound absorptive materials.

■參考文獻：
（一）中文文獻－
C01 鍾祥璋、劉繼凱，〈鋁合金穿孔裝飾吊頂板的吸聲特性〉，《聲學技術》，中國大陸，1997，卷16，期2，頁69-75。
C02 簡明傳，〈室內裝修材料及構造方法之吸音特性研究〉，台灣科技大學工程技術研究所碩士論文，台北，2000。
C03 馬大猷，〈微穿孔板吸聲体的準確理論和設計〉，《聲學學報》，中國大陸，1997，卷22，期5，頁385-393。
C04 劉克、馬大猷，〈擴散場內微穿孔板吸聲特性的實驗研究〉，《聲學學報》，，中國大陸，2000，卷25，期3，頁211-218。
C05 車世光、王炳麟、秦佑國，《建築聲環境》，淑馨出版社，台北，1994。
C06 經濟部中央標準局編，〈吸音用開孔鋁板(CNS-9957-A2144)〉，經濟部中央標準局印，台北，1983。
C07 經濟部中央標準局編，〈餘響室法吸音率測定法(CNS-9056-A3165)〉，經濟部中央標準局印，台北，1986。
C08 賴榮平、江哲銘、趙以諾，〈成功大學建築音響實驗室音響性能〉，《中國民國音響學刊》，台北，1990，期1，頁151-156。
C09 趙松齡編著，《噪音的降低與隔離(上冊)》，同濟大學出版社，上海，1985。
C10 徐萬春譯，《噪音與振動控制》，協志工業叢書出版，台北，民64。

（二）日文文獻－
J01 子安木盾，〈穴あき板構造体の吸音特性に關する二, 三の問題〉，《日本音響學會誌》，日本，1961，Vol. 17, pp. 31-42。
J02 木村 翔，〈穿孔板の背後に大空氣層有する吸音構造体の吸音特性〉，《日本建築學會論文報告集106號》，日本，1964，pp. 20-30。
J03 長友宗重著，《建築設計講座 建築の音響技術》，理工圖書株式會社，日本，1969。
J04 日本音響材料協會編，《吸音材料》，技報堂出版株式會社，日本，1981。
J05 木村 翔，《建築音響と噪音防止計畫》，彰國社，日本，1982。

（三）英文文獻
E01 Bolt, R. H., “On the design of perforated facings for acoustic materials”, J. Acoust. Soc. Am., America, 1947, Vol.19, No.5, pp. 917-921.
E02 Sacerdote, G. G., Gigli. A., “Absorption of Sound by Resonant Panels”, J. Acoust. Soc. Am., America, 1951, Vol.23, No.3, pp. 349-352.
E03 Ingard, K. U., Bolt, R. H., “Absorption Characteristics of Acoustic Material with Perforated Facings”, J. Acoust. Soc. Am., America, 1951, Vol.23, No.5, pp. 533-540.
E04 Callaway, D. B., Ramer, L. G., “The use of perforated facings in designing low frequency resonant absorbers,” J. Acoust. Soc. Am., America, 1952, Vol.24, No.3, pp. 309-312.
E05 Ingard, K. U., “Perforated facing and sound absorption”, J. Acoust. Soc. Am., America, 1954, Vol.26, No.2, pp. 151-154.
E06 Davern, W. A., “Perforated facings backed with porous materials as sound absorbers－an experimental study”, Applied Acoustics, England, 1977, Vol.10, pp. 85-112.
E07 Guignouard, P., and Meisser, M., “Prediction and Measurement of the Acoustical Impedance and Absorption Coefficient at Oblique Incidence of Porous Layers with Perforated Facings”, Noise Control Eng. J., America,1991, Vol.36, No.3, pp. 129-135.
E08 Takahashi, D., “A new method for predicting the sound absorption of perforated absorber systems,” Applied Acoustic, England, 1997, Vol.51, pp. 71-84.