| English | eng-000 |
| sound reduction factor | |
| 普通话 | cmn-000 | 隔声量 |
| English | eng-000 | acoustical reduction coefficient |
| English | eng-000 | acoustical reduction factor |
| English | eng-000 | noise insulation factor |
| English | eng-000 | sound reduction index |
| English | eng-000 | sound transmission loss |