台灣竹材半穿孔吸音構造之性能研究

The Performance of the Semi-Perforated Sound-Absorbing Structure made by Taiwan Bamboo

蔡岡廷 ； 賴榮平

《中華民國音響學刊》 13期 (2008/11) Pp. 43-52

https://doi.org/10.30049/JASRC.200811.0005

摘要

國內有關竹複合嵌板類之綠色建築材料，在吸音性能指標之基本研發與測試資料仍然缺乏，故本研究將針對半穿孔竹複合嵌板探討其應用於建築室內環境之音響性能。竹材半穿孔吸音構造為一複合材料，由半穿孔竹複合嵌板和不同之背覆材料所組成，將不同組合之半穿孔竹複合嵌板構造進行不同變因之組合，已探討其吸音率之測值。
本研究半穿孔竹複合嵌板吸音特性在相同板材質下，無穿孔板呈現板振動吸音特性，板材厚度越薄其低頻域之吸音率越佳，半穿孔則為共振吸音特性，其穿孔率增加的情形下共振頻率則往高頻移動，半穿孔木質嵌板在相同條件下，發現於但在中高頻域，板材厚度對吸音率則無顯著影響，半穿孔木質嵌板背貼吸音材料均較無背貼吸音材質之吸音為佳，因此需背貼吸音材質才能獲致較佳之吸音特性。

關鍵字

竹 ； 半穿孔 ； 穿孔率 ； 吸音率 ； 共振頻率

並列摘要

The paper explores the influences of variations in perforated rate, panel thickness, and backing material on semi-perforated bamboo panels, while the data obtained from experiment can further be used for noise reduction.
In conclusion, 1) Given the same materials, the perforated and non-perforated panels formed different sound absorption coefficient curves, while non-perforated panels displayed sound absorption characteristics concerned with panel vibration, and semi-perforated panels displayed characteristics of resonance sound absorption. 2) Given semi-perforated panels of fixed thickness and backing material. Resonance frequency rose with increasing perforated rate. 3) Given semi-perforated panels under the same conditions, sound absorption coefficient enhanced with decreasing panel thickness in the low frequency range; while sound absorption coefficient was not significantly correlated with panel thickness in the high frequency range. 4) Semi-Perforated panels with backing material were superior in sound absorption than those without backing material, so back material is necessary for better sound absorption.

並列關鍵字

Bamboo ； Semi-Perforated ； Perforated Rate ； Sound Absorption Coefficients ； Resonance