Hz	Absorption Coefficient
100	0.18
125	0.22
160	0.24
200	0.39
250	0.60
315	0.62
400	0.48
500	0.38
630	0.39
800	0.41
1000	0.38
1250	0.31
1600	0.26
2000	0.25
2500	0.25
3150	0.26
4000	0.21
5000	0.16

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Absorption Coefficients