Impedance eduction in the presence of grazing flow based on an analytical multi-port model KU Leuven
© 2015 by ASME. Liner materials are commonly used to attenuate the noise propagating through a duct system. In order to assess the performance of the system in an early design phase, it is of the utmost importance to characterize the liner impedance accurately and in realistic conditions. This paper presents an impedance eduction technique, based on an analytical multi-port formulation for a rectangular duct with a lined wall. The multi-port ...