Comparison of Semi-Empirical Impedance Models for Locally-Reacting Acoustic Liners in a Wide Range of Sound Pressure Levels

A comparison is considered of the experimentally obtained impedance locally reacting acoustic liner samples with calculated using semi-empirical Goodrich, Sobolev and Eversman models. The models are outlined. In experiment, synchronously measured on a normal incidence tube by transfer function method Dean’s method. modification conventional proposed to obtain these measurements. To automate measurements, program code developed that controls sound generation recording signals. includes an optimization procedure for selecting voltage driver, providing required pressure level face sample at different frequencies. geometry specifics synchronous measurements aforementioned methods considered. Experiments performed levels from 100 150 dB in frequency range 500–3500 Hz. comparative analysis experimental results carried out.