Timeline for how to achieve a reduction of noise of -60 dB in as little thickness as possible of insulation material?
Current License: CC BY-SA 3.0
1 event
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 2, 2011 at 4:54 | history | answered | Lev Bishop | CC BY-SA 3.0 |