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- W2783456971 abstract "An equivalent fluid model based finite-difference time-domain algorithm is proposed to simulate the frequency characteristic of porous material with rigid frame. The rigid-frame porous material is replaced by an equivalent fluid characterized by the effective density and the effective bulk modulus, which reflect the viscous effects and thermal effects in the porous material, respectively. The effective density and the effective bulk modulus are frequency-dependent complex values, which are designed in the form of infinite impulse response filters in the frequency domain. The Z transform theory is used to discretize the frequency-domain wave equations. The accuracy of the proposed algorithm is preliminarily validated by good agreement between the calculated and measured normal-incidence sound absorption coefficients of two samples composed of different multiple-layered materials in a wide frequency range." @default.
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- W2783456971 date "2018-01-01" @default.
- W2783456971 modified "2023-10-12" @default.
- W2783456971 title "An equivalent fluid model based finite-difference time-domain algorithm for sound propagation in porous material with rigid frame" @default.
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- W2783456971 doi "https://doi.org/10.1121/1.5020268" @default.
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