 |
| sound absorbing: 38 phrases in 13 subjects |
| Acoustics | 1 |
| Business | 1 |
| Chemistry | 1 |
| Communications | 1 |
| Construction | 13 |
| Earth sciences | 6 |
| Environment | 3 |
| Health care | 6 |
| Natural resourses and wildlife conservation | 1 |
| Optics branch of physics | 1 |
| Physics | 1 |
| Technology | 2 |
| Transport | 1 |