噪声与振动控制2012，Vol.32Issue(3)：191-197,7.DOI:10.3969/j.issn.1006-1355.2012.03.044
有源通风隔声窗降噪效果影响因素的实验研究
Experimental Investigation on Influence Factors of Active Noise Attenuation of Sound-insulation Ventilation Window
摘要
Abstract
The factors influencing the active noise attenuation of a sound-insulation ventilation window were investigated experimentally. The window system was constructed by staggering the opening sashes of a spaced double glazing window to allow ventilation. Transparent microperforated absorbers (MPA) and sound-absorbing material were used along the ventilation path to attenuate external noise. The performances of the four-input and four-output active control system for the window with different secondary source locations and secondary-path modeling length were compared . mutually. It is found that to achieve the considerable attenuation effect in the surface of the window, locations of the secondary sources should be so arranged that the effective scope of the secondary sound field can cover the inner space of the window and the noise energy can be reduced, or the sound field is directed to the internal window glass to directly control the radiation noise. If the optimal length of the secondary-path modeling cannot be achieved in actual application, a longer modeling length should be chosen appropriately to avoid degenerating the noise attenuation or leading the system instability.关键词
声学/通风隔声窗/有源噪声控制/次级源位置/建模长度/实验研究Key words
acoustics / sound-insulation ventilation window / active noise control / secondary source location /modeling length / experimental investigation分类
通用工业技术引用本文复制引用
玉昊昕,陈克安,胡涵,马玺越..有源通风隔声窗降噪效果影响因素的实验研究[J].噪声与振动控制,2012,32(3):191-197,7.基金项目
西北工业大学研究生创业种子基金(基金编号:Z2011032) （基金编号:Z2011032）
