Empirical Formulas of Sound Absorption Coefficients and Spectrums of
EmpiricalFormulasofSoundAbsorptionCoefficientsandSpectrumsof，张新安，，Anewtheoryisputforwardthatthesoundabsorptionprincipleofperforatedpanelissimilartoimperforatedplate.Soundisabsorbedbythevibrationofpanel,whilenotthehol