Boundary Condition for the Acoustic Impedance of Lightweight Micro Perforated Panels and Membranes


Theories of the acoustic impedance of micro perforated panels and membranes for normally incident waves have been well developed for decades. These theories are mainly based on the assumption that the particle velocity at the boundary of the hole wall is equal to zero. This assumption is valid when the panel/membrane is massive and does not vibrate. This… (More)


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