Study on Sound Absorption Properties of Polyvinyl Chloride (PVC) Film Multicavity Structure Materials

Figure 3

(a) Sound absorption curve of FPB samples with different thicknesses, (b) the effect of thickness on average sound absorption coefficient, (c) the effect of thickness on starting frequency, (d) sound absorption curve of FPB samples with different film bubbles diameter, (e) the effect of film bubbles diameter on average sound absorption coefficient, (f) the effect of film bubbles diameter on starting frequency, (g) sound absorption curve of FPB samples with different porosities, (h) the effect of porosity on average sound absorption coefficient, and (i) the effect of porosity on starting frequency.

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