The results show that the appropriate combination of sound absorption materials and sound absorption structures can improve the sound absorption effect, and the absorptionbroadband is widened.
结果表明，吸声材料与吸声结构的有机结合显著提高了结构的吸声效果，拓宽了吸声频带宽度。
2
The active noise control technology and adaptive control technology were combined together in the paper, the adaptive and active broadband sound absorption system was designed.