The latest research status of porous sound-absorbing materials

Abstract With the rapid development of urbanization and transportation, noise pollution has become one of the most severe environmental problems for people. It usually causes various disorders and significantly affects human work efficiency and living standards. In the noise control field, using sound-absorbing materials to reduce noise is a critical way to reduce the harm of noise pollution. As the most widely used sound absorption material, porous materials are lightweight, have a wide absorption frequency range, and have strong sound absorption ability. They have great potential in the field of sound absorption. This paper first summarizes the sound absorption mechanism of porous sound absorption materials and the critical factors affecting the sound absorption of porous materials. Secondly, the latest research status of fiber, foam, and new porous sound absorption materials in recent years is reviewed, and the advantages and disadvantages of different porous sound absorption materials are expounded. Finally, the future development trend of porous sound-absorbing materials is prospected. With the continuous expansion of knowledge in this field, it is expected that porous sound-absorbing materials will continue to improve and find more practical applications in emerging fields in the future.