Acoustic Absorption of Natural Fiber Composites

Table 4

List of the sound absorption coefficients of different fibrous material at different frequencies.

Materials	Fiber diameter (m)	SAC at  Hz	Ref.
Cotton	13.5	0.50	[24, 25]
Flax	21.8	0.40
Ramie	24.4	0.40
Wool	37.1	0.20
Jute	81.2	0.20
Sisal	213	0.10