Acoustical resonators of complex shape with partially permeable walls

Acoustic bulletin, Vol. 2 4, (1999) p.23-31
By method of partial domains a mathematical description of the wave propagation model has been presented for a multistep resonator with partially permeable walls, acoustical field in which is excited by a plane radiator oscillating according to the harmonic dependence. Behavior of the first resonance frequency depending on geometrical and physical parameters for considered resonator has been investigated on an example of the simplest plane and circular resonators. A dependence of resonance properties from the number of steps has been described. An example of an approximation of complex multistep structure with a simple resonator has been considered.
acoustic resonator, a multistep structure