ABSTRACT

Summing up the above, we learned the importance of noise reduction and ventilation, so this study is to design the structure with both functions. Generally, the most common main theories for the research of airflow circulation with noise elimination are muffler theory (H. Luo et al. 1997) and resonator theory (Xu Wang et al. 2011). There are also some acoustic discussed of specific shape structures (S.K. Tang et al. 2008).