Table 2.
Distribution of acute injury and serious acute injury by noise exposure and hearing categories, tinnitus and hearing asymmetry
| All Acute Injury | Serious* Acute Injury | |||
|---|---|---|---|---|
| N | % | N | % | |
| Total Injuries | 4897 | 100 | 1,104 | 100 |
| Person-jobs in which injuries occurred | 3296 | 100 | 1,026 | 100 |
| Noise Exposure | ||||
| < 82 dBA | 2465 | 50 | 501 | 45 |
| 82 < 84.99 dBA | 939 | 19 | 221 | 20 |
| 85 < 87.99 dBA | 1127 | 23 | 252 | 23 |
| ≥ 88 dBA | 366 | 8 | 130 | 12 |
| PTA.5123 (binaural average at.5, 1, 2, 3 kHz) | ||||
| < 25 dBHL | 4359 | 89 | 982 | 89 |
| ≥ 25 dBHL | 538 | 11 | 122 | 11 |
| HTL at 4 kHz (binaural average at 4 kHz) | ||||
| < 25 dBHL | 2857 | 58 | 625 | 57 |
| ≥ 25 dB | 2040 | 42 | 479 | 43 |
| HTL at 6 kHz (binaural average at 6 kHz) | ||||
| < 25 dBHL | 2557 | 52 | 562 | 51 |
| ≥ 25 dBHL | 2340 | 48 | 542 | 49 |
| PTA46 (binaural average at 4, 6 kHz) | ||||
| < 25 dBHL | 2681 | 55 | 595 | 54 |
| ≥ 25 dBHL | 2216 | 45 | 509 | 46 |
| Tinnitus | 985 | 20 | 203 | 18 |
| Hearing Asymmetry** | 270 | 5 | 66 | 6 |
Abbreviations: dBA, A-weighted decibels; HTL, hearing threshold level; PTA, pure tone average; dB, decibels, dBHL, decibels hearing level
*
requiring medical treatment, work restrictions or lost work time
**
≥15 dB difference at .5,1,2 kHz or ≥ 30 dB difference at 3, 4, 6 kHz