摘要
本文通过对单极子次级声源管道有源降噪中声场能量的再分布与初、次级声源的工作情况的定量分析与讨论,说明了有源降噪的三种能量机制中的多极子能量存贮机制,总是同能量转移或吸收机制中的一种同时存在的,哪一种机制起主导作用取决于初、次级声源之间的距离.
There are in total three energy mechanisms for active noise control: acoustical energy absorption, spatial reflection and reactive storage respectively. In this paper, the acoustical energy distribution and the radiation of primary and 'secondary sources in a duct with active noise attenuator of monopole secondary source are analyzed and discussed theoretically. The results show that when the distance between primary source and the secondary changes from very long to very short, the predominant mechanism for such a duct system also varies from the reflection form to the storage one, by which it is demonstrated that the energy storage mechanism of multipole sources always accompanies either of the other two.
出处
《声学学报》
EI
CSCD
北大核心
1992年第5期369-374,共6页
Acta Acustica
基金
国家自然科学基金
