I seeking for best answers and the advantages of using Delany-Bazley empirical model that used to predict sound absorption value, comparing to other models that proposed by Allard-Johnson, Miki or Wilson`s Model. I know its simple and fastest method but i finding more strong reason to compute my results even it out dated method. If attach with some proven research publications are most helpful for me. Even comparison among the models also would help me. Thank you to all.