TABLE I.
Average audiometric air-conduction pure-tone thresholds (dB HL) at each frequency tested and pure-tone average (PTA = average thresholds at 500, 1000, and 2000 Hz) for each age group. Standard deviations are shown below each respective average value.
| Audiometric pure-tone thresholds (dB HL) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Frequency (Hz) | ||||||||
| 250 | 500 | 1000 | 1500 | 2000 | 3000 | 4000 | PTA | |
| YNH | ||||||||
| AVG | 8.3 | 8.3 | 7.1 | 6.0 | 7.1 | 9.5 | 5 | 7.5 |
| SD | 6.5 | 4.4 | 5.8 | 3.2 | 4.9 | 5.2 | 3.6 | 4.1 |
| ONH | ||||||||
| AVG | 13.8 | 11.5 | 11.5 | 10.8 | 11.9 | 15 | 13.0 | 11.6 |
| SD | 5.8 | 3.7 | 3.1 | 5.1 | 4.8 | 4.7 | 5.2 | 2.5 |