【摘要】 介绍了基于LabVIEW和狭缝共振吸声结构的主动吸声系统;该系统是将虚拟仪器技术与狭缝式吸声结构相结合,通过改变狭缝宽度以改变穿孔率,从而达到主动吸声的目的;用实验的方法,对改进的狭缝共振吸声结构的共振频率公式进行修正,使其适合该虚拟仪器系统。实验表明,该系统具有虚拟仪器和穿孔板吸声结构的优点,能够有效的达到主动吸声降噪的目的。更多还原

【Abstract】 Introduced active absorption system based on LabVIEW and slit resonance sound absorption structure.This system integrated virtual instrument and slit absorption structure,can reduce noise actively.The system can change the perforating rate by varying the width of the slit,so that the aim of active sound absorption is attained.The formant frequency formula can be adapted to the virtual instrument system after being corrected through experiment.The experiment indicates that this system has the virtue of virtual instrument and perforation board absorption structure,can achieve the purpose of active reducing noise effectively.更多还原