论文标题
对单一和多度自由声音旋转器的颈部扩展的调查
An Investigation On Neck Extensions For Single and Multi-Degree Of Freedom Acoustic Helmholtz Resonators
论文作者
论文摘要
在实验和数值上研究了基于Helmholtz谐振器的单一和多度谐振器的颈部延伸的影响，并研究了所得的传输系数和共振频率。已经表明，随着颈部延伸长度增加的单个自由衬里导致共振频率被推到较低的频率值，但是，这种转移向较低的频率并不是随着长度的增加而线性的。还提供了一项关于在双重自由度衬里内主要和/或次级颈部的颈部延伸的研究。结果表明，两种颈部延伸概念都会通过双重自由度Helmholtz谐振器增加声音吸收的带宽。
The effect of neck extensions in single and multi-degree of freedom Helmholtz resonator based acoustic liners is studied both experimentally and numerically and the resulting transmission coefficient and resonance frequencies are examined. It has been shown that a single degree of freedom liner with increasing neck extension lengths leads to the resonance frequencies being pushed to lower frequency values, however, this shift to lower frequencies is not linear with increasing length. A study on including neck extensions for the primary and/or secondary neck within a double degree of freedom liner is also presented. It is shown that both neck extension concepts lead to an increase in bandwidth of sound absorption by a double degree of freedom Helmholtz resonator.
