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Effect of non-acoustic properties on the sound absorption of polyurethane foams

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Figure

Table 1. Non-acoustical properties of eleven samples of polyurethane (PU) foam [6].
Fig. 1. Sound absorption coefficient of PU Foam #4 for different values of porositySound absorption coefficient of PU Foam or different values of porosity
Fig. 3. Sound absorption coefficient of PU Foam Sound absorption coefficient of PU Foam #10 for different values of po for different values of porosity
Fig. 4. Sound absorption coefficient of PU foam group I for different values ofSound absorption coefficient of PU foam group I for different values ofSound absorption coefficient of PU foam group I for different values of /, U and U&
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