分流扬声器用于封闭空间降噪的布放研究

徐陈淳, 王有藩, 陶建成

A study of the placement of shunt loudspeakers for noise reduction in enclosed spaces

Chenchun Xu, Youfan Wang, Jiancheng Tao

表5 地面吸声时本征频率处分流扬声器不同布放下实测平均声压级和降噪量 (dB)

Table 5 Measured average SPL and noise reduction with different SL arrangements at the eigenfrequencies with sound absorption material laying on the bottom surfacev

分流扬声器布放方式 方式(a) 方式(b) 方式(c) 方式(d) 方式(e) 方式(f) 147 Hz SPLs 82.7 78.3 84.9 82.6 84.6 SPLr 82.8 73.6 81.0 75.8 78.6 76.4 ΔSPLr 9.3 1.9 7.0 4.3 6.4 169 Hz SPLs 82.4 78.9 82.6 84.5 84.0 SPLr 82.5 73.9 79.7 78.6 76.1 77.1 ΔSPLr 8.6 2.8 3.9 6.4 5.3