单自由度和多自由度声学亥姆霍兹谐振器颈部延伸的研究

A. Gautam, A. Celik, M. Azarpeyvand
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引用次数: 2

摘要

本文通过实验和数值方法研究了基于单自由度和多自由度亥姆霍兹谐振腔的声衬垫中颈部伸长的影响,并对由此产生的透射系数和共振频率进行了分析。研究表明,随着颈部延伸长度的增加,单自由度线性线性管会导致共振频率被推到较低的频率值,然而,这种向较低频率的转移并不是随着长度的增加而线性的。本文还研究了在双自由度衬垫内对主颈和/或次颈进行颈部延伸的方法。结果表明,两种伸长颈的概念都会导致双自由度亥姆霍兹谐振器吸声带宽的增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Investigation On Neck Extensions For Single and Multi-Degree Of Freedom Acoustic Helmholtz Resonators
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.
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