N2 - The distribution of perturbations of pressure and velocity in a rectangular resonator is considered. A resonator contains a gas where thermodynamic processes take place, such as exothermic chemical reaction or excitation of vibrational degrees of a molecule’s freedom. These processes make the gas acoustically active under some conditions. We conclude that the incident and reflected compounds of a sound beam do not interact in the leading order in the case of the periodic sound with zero mean pressure including waveforms with discontinuities. The acoustic field before and after forming of discontinuities is described. The acoustic heating or cooling in a resonator is discussed. L1 - http://journals.pan.pl/Content/101328/PDF-MASTER/aoa-2016-0007.pdf L2 - http://journals.pan.pl/Content/101328 PY - 2016 IS - No 1 EP - 73 DO - 10.1515/aoa-2016-0007 KW - standing waves KW - acoustically active gas KW - resonator KW - nonlinear propagation of sound KW - 43.25 KW - 43.35.Fj A1 - Perelomova, Anna PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 41 DA - 2016 T1 - Standing Waves in a Rectangular Resonator ContainingAcoustically Active Gases SP - 67 UR - http://journals.pan.pl/dlibra/publication/edition/101328 T2 - Archives of Acoustics