Question: 4 . 2 Absorbing Layer Please determine the sound absorption coefficient for normal incidence for a 1 0 c m thick porous layer in front

4.2 Absorbing Layer
Please determine the sound absorption coefficient for normal incidence for a 10cm thick porous layer in front of a sonically hard wall. The porous material has an air flow resistivity of 10kNsm4 and a porosity and tortuosity ~~1. The fluid is air. Calculate the values for 200Hz and 2kHz.
Note: Use the model of Hamet.
4.2 Absorbing Layer Please determine the sound absorption coefficient for normal

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