Paragraph 1.2 Materials
The artificial flooring is composed of a cover of absorptive material of which the absorption coefficients α, measured in accordance with ISO 354 first edition, 1985-02-01, are within the limits given in the following table:
| Frequency/Hz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| α minimum | 0.00 | 0.20 | 0.40 | 0.60 | 0.70 | 0.80 |
| α maximum | 0.20 | 0.40 | 0.60 | 0.80 | 0.90 | 1.00 |