Acoustic gas oscillations in a cubic resonator with a throat under small perturbations

[Display omitted] •The shape of the gas pressure wave in time preserves a continuous form for all investigated amplitudes and excitation frequencies, with weak nonlinearity at the resonance frequency.•The amplitude of pressure oscillations changes depending on the amplitude of the piston stroke according to the power law close to linear dependence.•In the cylinder we observe the maximum value of the pressure oscillation amplitude due to the increasing role of dissipative losses on the cylinder walls. Theoretical and experimental studies of forced gas oscillations in a cubic resonator with a throat near resonance are carried out. At the resonance frequency, the gas pressure waveform is close to harmonic in time. The amplitude-frequency characteristics are built. A satisfactory agreement between calculation results for the spatial distribution of the gas pressure oscillation amplitude in the resonator with the obtained experimental data is shown.