•28/4型立体扩散型吸声板混响室无规入射吸声系数:
型号13PMK中心频率(Hz)125250500100020004000降噪系数NRC
后空腔50mm吸声系数a0.431.081.120.970.900.921.02
后空腔100mm吸声系数a0.651.051.020.940.820.830.96
后空腔200mm吸声系数a0.950.970.921.030.900.92