A mode-matching model for the impedance of perforated plate liners

Before tackling the issue of the SPL nonlinearity on acoustic units made of a perforated plate and a porous material, each element was tested separately in the impedance tube

This procedure was performed by Beck [3] on a dual reso- nance acoustic liner and more recently proposed in Laly’s impedance model [4] for micro-perforated liners based on a

Figure 8 presents the profiles of the turbulent kinetic energy (TKE) normalized by U ∞ 2 and the profiles of the mean axial velocity normalized by U ∞ for different

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We give conditions on the perforations (inspired from [2, 3, 4]), which imply that, away from the defect, the perforations become periodic, and which allow to prove convergence

Following this model, early authors considered perforated stones and associated lithic artefacts as markers of what was then believed to pertain to a Southeast Asian

The modelling approach proposed herein employs an approximated expression of the eigen- functions of the perforated clamped plate in form of two- dimensional series expansion over

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