Resonance responses of compound screens with below-cutoff holes and eigenoscillation intercoupling as its forward base

Lower eigenoscillations responsible for the resonance frequency response forming over the single-mode range of compound screen perforated with below cutoff holes are investigated. The general principles of symmetry are applied to classify the ones in symmetry groups and to set up the peculiarities of screen resonance response as consequence of eigenoscillation intercoupling.