- 期刊
不同熱處理木材對聲學性能之影響
Effects of Different Thermal-Treated Treatment on the Acoustic Properties of Wood
摘要
木材熱處理是一種無毒的物理改質方式，亦可增加尺寸安定性與提升耐腐性能外，更可改善許多木質材料應用於室內之缺點。本研究以目前商業界較常使用之花旗松為材料，探討常用之熱處理溫度（170°C、190°C、210°C、230°C）條件下對木材聲學性能之影響，並以實際空間進行驗證。其研究結果顯示：（1）木材熱處理溫度對於吸音係數具有顯著影響，吸音係數隨溫度升高而增加，在聲音散射係數上與對照組雖有些許差異，但受溫度變化影響則較小；（2）熱處理木材對於聲場之影響主要在於中高頻帶（500～5k Hz）；（3）置入10%裝修率之熱處理材於3坪空間牆面上其迴響時間可以顯著減少0.9－1.8秒，且在明晰度上於中高頻帶可控制在-2～1dB的改善效果。
並列摘要
Thermal treatment of wood is a non-toxic physical modification to improve dimensional stability and durability against decay and even to improve the shortcomings of wood materials used in indoor. In this study, Pseudotsuga menziesii, a commercial used wood, was investigated it's acoustic properties after thermal treatment at 170°C, 190°C, 210°C and 230°C, respectively. The results revealed: (1) The thermal-treated temperature of wood for the absorption coefficient has a significant impact with the temperature increases, while the scattering coefficient with the control group has a slight difference, and the changes in different thermal temperature treatment for acoustic effects was not significant. (2) The impact of the sound field for the thermal-treated of wood was mainly occurred in the high frequency band (500-5K). (3) The response time in the 3 square meters of space, placed the thermal-treated wood on the wall (renovation rate of 10%), can be significantly reduced to 0.9-1.8 seconds and the improvement on clarity in the high-frequency band can be controlled within -2~1dB.
延伸閱讀
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