嵌入導引聲管的室內聲場性能之實驗研究

Experimental Study on the In-Door Sound Field Performance of Embedding Acoustic Ducts

蕭肇殷(Chao-Yin Hsiao) ； 鄧錦坤(Chin-Kun Teng) ； 周建宏(Chien-Hung Chou) ； 李宗祐(Tsung-Yu Lee)

《中華民國振動與噪音工程學會論文集》 1998 (1998/05) Pp. 103-110

https://doi.org/10.30028/CSSVANNUAL.199805.0103

摘要

導引消音技術為導引噪音來自我消除之技術。本文提出聲音反射路徑樹，根據反射路徑樹、導引消音技術、虛像法提出反射弱枝效應的概念。再根據反射弱枝效應的概念建立嵌入導引聲管實驗系統以電腦模擬及實臉的方式來觀察其對室內反射雜音消除之可行性。
電腦模擬方面，假設在已知的嗓音源位置、頻率和聲源強度以及已知導管組合條件下，來觀察室內聲場之散佈及對反射噪音消除之情況。實驗方面，選擇特定頻率的聲源執行實驗與電腦模擬的結果相對照。
電腦模擬與實驗結果皆可支持反射弱枝效應的概念，本研究結果將可做為規劃消音系統之參考。

並列摘要

The technique that guides the noise to cancel itself is called the self guided noise cancellation technique. In this paper, we construct a route tree of the reflection acoustic waves, and according to this route tree, the self guided noise cancellation technique, and the virtue image method of analyzing the reflection acoustic waves, we propose the concept of the branch weaken effect of the route tree. According to this concept of the branch weaken effect, we construct an embedding acoustic ducts system, and conduct both the computer simulations and experiments to investigate the feasibility of canceling the reflected noisy waves.
For the computer simulations, assume that we know the location, the frequency, and the intensity of the noise source, we conduct the related computer simulations to observe the distribution of the in door sound field, and the situation of the reflected noise waves cancellation. As to the experimental study, we select noise source with some specified frequencies, conduct the related experiments, and cross check the results with that of the related computer simulations.
Both the computer simulation results and experimental results can support the concept of the branch weaken effect. The results of this study can be used as the references for designing the noise cancellation systems in the future.