Frequency analysis of the acoustic pressure of nonlinear standing waves
Keywords:Data acquisition, Frequency domain analysis, Nonlinear systems, Spectrum analysis, Frequency spectrum, Nonlinear standing acoustic waves, Standing wave tubes
AbstractThe acoustic pressure inside a nonlinear standing wave resonator in the frequency domain. and the effect of nonlinearity on the frequency spectrum of the pressure signal through numerical and experimental investigations are examined. Analytical. numerical and experimental analysis of linear and nonlinear standing acoustic waves in time and space domains have been extensively investigated. We have developed a setup to measure high-amplitude pressure inside the standing wave tube, and the setup consists of a rigid-walled tube of adjustable length, a driving system to excite the standing wave inside the tube, and data acquisition system. The measurements were made at five different locations along the channel center axis, at different excitation voltages. The frequency spectrum of the pressure and particle velocity' signals were analyzed at different frequencies by using verified model.
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