Table 6 Actual vs. Predicted NRC with error %.

From: A comparative study on acoustical properties using waste recycled porous materials for environmental sustainability

S. No

Vermiculite (Wt.%)

Rigid PU Powder (Wt.%)

Gypsum (Wt.%)

Actual NRC

Predicted NRC

Residual

Error %

S1

5

10

85

0.294

0.302

−0.008

−2.721

S2

15

10

75

0.169

0.162

0.007

3.905

S3

5

30

65

0.265

0.273

−0.008

−2.943

S4

15

30

55

0.252

0.245

0.007

2.698

S5

5

20

75

0.321

0.306

0.015

4.798

S6

15

20

65

0.208

0.222

−0.014

−6.731

S7

10

10

80

0.19

0.189

0.001

0.579

S8

10

30

60

0.216

0.216

0.000

0.139

S9

10

20

70

0.22

0.221

−0.001

−0.227

S10

10

20

70

0.22

0.221

−0.001

−0.227

S11

10

20

70

0.22

0.221

−0.001

−0.227

S12

10

20

70

0.22

0.221

−0.001

−0.227

S13

10

20

70

0.22

0.221

−0.001

−0.227

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