Related Experiment Video
Updated: Dec 7, 2025

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
Experimental study of nonlinear acoustic impedance of circular orifices
Alexandr Komkin1, Aleksei Bykov1, Mikhail Mironov2
1Department of Power Engineering, Bauman Moscow State Technical University, Moscow 105005, Russia.
Abstract:
The results of experimental studies of the acoustic impedance of orifices in the plate in the impedance tube, using the transfer functions method in a wide range of sound pressure levels, are presented. Dependencies of the orifice impedance on its diameter in nonlinear regimes are obtained. It is established that in order to obtain reliable estimates of the orifice impedance, the particle velocity in the orifice should be determined by measurements. It is shown that the diameter of the orifice does not affect its acoustic impedance in the developed nonlinearity regimes. This impedance depends only on the particle velocity in the orifice, and this dependence is nonlinear.
Related Concept Videos
Pipe Flowrate Measurement
The orifice meter is a simple,...
Steady, Laminar Flow in Circular Tubes
Deriving the Speed of Sound in a Liquid
The speed of sound in fluids can be derived by considering a mechanical wave...
Sound Waves: Resonance
Sound as Pressure Waves
The pressure fluctuation depends on the difference in displacements between the successive points in the...
RLC Series Circuits: Impedance
Thus, the magnitude of the impedance is given by the following equation,

