TY - JOUR N2 - Two optimization aspects of the meshless method (MLM) based on nonsingular radial basis functions (RBFs) are considered in an acoustic indoor problem. The former is based on the minimization of the mean value of the relative error of the solution in the domain. The letter is based on the minimization of the relative error of the solution at the selected points in the domain. In both cases the optimization leads to the finding relations between physical parameters and the approximate solution parameters. The room acoustic field with uniform, impedance walls is considered. As results, the most effective Hardy’s Radial Basis Function (H-RBF) is pointed out and the number of elements in the series solution as a function of frequency is indicated. Next, for H-RBF and fixed n, distributions of appropriate acoustic fields in the domain are compared. It is shown that both aspects of optimization improve the description of the acoustic field in the domain in a strictly defined sense. L1 - http://journals.pan.pl/Content/118241/PDF/aoa.2020.135252.pdf L2 - http://journals.pan.pl/Content/118241 PY - 2020 IS - No 4 EP - 654 DO - 10.24425/aoa.2020.135252 KW - architectural acoustics KW - meshless method KW - radial basis functions KW - impedance boundary condition A1 - Prędka, Edyta A1 - Kocan-Krawczyk, Anna A1 - Brański, Adam Jan PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 45 DA - 2020.12.28 T1 - Selected Aspects of Meshless Method Optimization in the Room Acoustics with Impedance Boundary Conditions SP - 647 UR - http://journals.pan.pl/dlibra/publication/edition/118241 T2 - Archives of Acoustics ER -