Acoustics
Description (hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 | NRC | SAA |
2” panel w/ 1” core & 1” airspace | 0.05 | 0.43 | 1.01 | 1.19 | 1.12 | 1.09 | 0.95 | 0.95 |
2” panel w/ 1” core & 1” low density airspace fill | 0.19 | 0.77 | 1.09 | 1.18 | 1.15 | 1.11 | 1.05 | 1.04 |
4” panel w/ 2” core & 2” airspace | 0.56 | 1.17 | 1.30 | 1.28 | 1.18 | 1.13 | 1.25 | 1.20 |
4” panel w/ 2” core & 2” low density airspace fill | 0.79 | 1.33 | 1.29 | 1.27 | 1.17 | 1.19 | 1.21 | 1.23 |
Values estimated from published ASTM C-423 in a type A mounting with unbacked, acoustically transparent panel fabrics