Experimental Study on the Sound Absorption Properties of Finger Millet Straw, Darbha, and Ripe Bulrush Fibers

Figure 9

Comparison of sound absorption properties of homogenous hybrid fiber combinations with individual fibers: (a) S10 with S1 and S2, (b) S11 with S1 and S3, (c) S12 with S2 and S3, and (d) S10, S11, and S12 combinations (S1, S2, and S3). Furthermore, the sound absorption properties of homogenous hybrid combinations are comparable to those of stacked hybrid combinations.

(a)

(b)

(c)

(d)