Table 1.
Individual subject information and average SOAE changes. The numbers in parentheses are standard deviations.
| Subject | Initial age | Sex | No. of SOAEs | Years measured | Measurements | Average frequency shift (%∕year) | Average level shift (dB∕year) |
|---|---|---|---|---|---|---|---|
| 1 | 6 | F | 3 | 4.0 | 4 | −0.27 (0.07) | −0.6 (0.5) |
| 2 | 6 | F | 19 | 4.1 | 5 | −0.26 (0.09) | 0.4 (2.3) |
| 3 | 7 | F | 6 | 19.3 | 16 | −0.19 (0.04) | −0.7 (0.3) |
| 4 | 9 | F | 11 | 16.3 | 15 | −0.23 (0.03) | −0.5 (5.8) |
| 5 | 9 | M | 2 | 13.5 | 11 | −0.19 | −0.5 |
| 6 | 12 | F | 9 | 19.5 | 15 | −0.35 (0.06) | −0.6 (5.0) |
| 7 | 23 | F | 3 | 14.1 | 3 | −0.19 (0.07) | 0.0 (0.4) |
| 8 | 27 | F | 4 | 7.1 | 3 | −0.29 (0.07) | −0.6 (1.4) |
| 9 | 28 | F | 2 | 13.8 | 3 | −0.16 | −0.9 |
| 10 | 30 | F | 6 | 6.4 | 8 | −0.13 (0.07) | −1.1 (9.3) |
| 11 | 30 | F | 2 | 5.1 | 2 | −0.27 | −0.1 |
| 12 | 31 | F | 10 | 5.0 | 2 | −0.21 (0.06) | −1.5 (1.2) |
| 13 | 32 | F | 2 | 5.0 | 2 | −0.13 | −0.3 |
| 14 | 36 | F | 3 | 5.1 | 2 | −0.41 (0.01) | −0.2 (0.6) |
| 15 | 36 | M | 1 | 4.1 | 2 | −0.17 | −2.1 |
| 16 | 37 | M | 1 | 6.8 | 2 | −0.41 | −0.8 |
| 17 | 38 | M | 1 | 15.0 | 5 | −0.21 | −0.5 |
| 18 | 41 | M | 11 | 19.3 | 47 | −0.28 (0.07) | −0.3 (0.5) |