Information on hearing standards for European Class 3 ATCOs
| Frequency in Hz | Maximal Acceptable Hearing Loss in dB |
| 500 | 20 |
| 1000 | 20 |
| 2000 | 20 |
| 3000 | 35 |
| Frequency in Hz | Maximal Acceptable Hearing Loss in dB |
| 500 | 35 |
| 1000 | 35 |
| 2000 | 35 |
| 3000 | 50 |
For audiograms which fall outside the above, refer to the AMS
Validity periods for audiograms are:
Under 40 4 yearly
40 plus 2 yearly
.
September 2009