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An investigation on physical mechanism for active sound absorption structure of flat panel
Author(s): HAO Xia-ying, CHEN Ke-an, LU Jing
Pages: 339-
347
Year: 2010
Issue:
3
Journal: Journal of Vibration Engineering
Abstract: 有源吸声结构是近年来提出的吸收低频反射声的有效方案,对其物理机制的分析将为系统优化设计、次级源和误差传感器布放及控制目标选取等关键问题提供理论支持.在最小反射声功率条件下,从控制前后初、次级结构的反射声功率和净声强的变化,以及反射声场中声强的分布来阐述吸声降噪中的物理机制.结果表明,吸声降噪中的能量转换分为能量抑制、能量吸收以及能量抵消3种机制.从近场声强的角度看,有源吸声主要是通过声强幅度抑制和...
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