Acoustic Absorption of Natural Fiber Composites

Table 6

Acoustic absorption study of fibrous, granular, and fibrogranular composites [23].

Materials	SAC at 500 Hz
	Thickness
	30 mm	40 mm	50 mm
Cotton fiber-rubber granulate	0.29	0.42	0.74
Cotton fiber	0.34	0.37	0.62
Rubber granulate	0.12	0.18	0.26