the support of the National Basic Research Program(973 Program)of China(Grant No.2011CB610304);the National Natural Science Foundation of China(Grant Nos.11332004 and 11402046);China Postdoctoral Science Foundation(No.2015M571296);the 111 Project(B14013);the CATIC Industrial Production Projects(Grant No.CXY2013DLLG32)
We present a design method for calculating and optimizing sound absorption coefficient of multi-layered porous fibrous metals (PFM) in the low frequency range. PFM is simplified as an equivalent idealized sheet with...