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Sound insulation and vibration reduction of modified zinc roof using natural fiber ( arenga pinnata )

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Figure

Figure 2.1 : Room With and Without Sound Absorptive Treatment. (Egan, 1988)
Figure 2.2 : Effect of sound absorbers addition. (Egan, 1988).
Table 2.1 : Material and structure for noise control
Figure 2.3 : Absorption coefficients of composite materials M1 and M2
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