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

Table 4

Statistical data analysis: NRC increase percentage with comparison to all combinations.

Sample code	NRC	Increases in NRC values (%)
		S1	S2	S3	S4	S5	S6	S7	S8	S9	S10	S11	S12
S1	0.78	0	9.30	7.14	9.30	9.83	12.36	11.36	11.36	13.33	13.33	14.29	16.13
S2	0.86	10.26	0	2.38	0.00	0.58	3.37	2.27	2.27	4.44	4.44	5.49	7.53
S3	0.84	7.69	2.33	0	2.33	2.89	5.62	4.55	4.55	6.67	6.67	7.69	9.68
S4	0.86	10.26	0	2.38	0	0.58	3.37	2.27	2.27	4.44	4.44	5.49	7.53
S5	0.865	10.90	0.58	2.98	0.58	0	2.81	1.70	1.70	3.89	3.89	4.95	6.99
S6	0.89	14.10	3.49	5.95	3.49	2.89	0	1.14	1.14	1.11	1.11	2.20	4.30
S7	0.88	12.82	2.33	4.76	2.33	1.73	1.12	0	0	2.22	2.22	3.30	5.38
S8	0.88	12.82	2.33	4.76	2.33	1.73	1.12	0	0	2.22	2.22	3.30	5.38
S9	0.90	15.38	4.65	7.14	4.65	4.05	1.12	2.27	2.27	0	0	1.10	3.23
S10	0.90	15.38	4.65	7.14	4.65	4.05	1.12	2.27	2.27	0	0	1.10	3.23
S11	0.91	16.67	5.81	8.33	5.81	5.20	2.25	3.41	3.41	1.11	1.11	0	2.15
S12	0.93	19.23	8.14	10.71	8.14	7.51	4.49	5.68	5.68	3.33	3.33	2.20	0