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| audibility threshold | |||
| hearing level; auditory threshold; hearing threshold; HL (Hearing Level Enidan); threshold of audibility | |||
| слуховой порог: 18 phrases in 7 subjects |
| Acoustics | 4 |
| Aviation medicine | 2 |
| Medical | 5 |
| Occupational health & safety | 2 |
| Physiology | 1 |
| Security systems | 1 |
| Technology | 3 |