Rotor stator acoustic interaction, death and birth of resonance frequency

Guiding and resonance phenomenon near a periodic double cascade of plates has been investigated. Much attention has been paid to the difference from the oscillations near single periodic cascade of plates. It has been demonstrated that the mutual influence of the two periodic cascades decrease rapidly with the increasing distance between them, but at short distances the distortions in the oscillations localised near one periodic cascade of plates caused by the interference of the other become substantial.