(b) Residual hearing
| Number | Age (years) | Sex | Cause of deafness | Hearing threshold (dB) | Duration of deafness (years) | Duration of hearing aid use (years) | |
|---|---|---|---|---|---|---|---|
| Left (without aid) | Right (without aid) | ||||||
| 1 | 18 | F | Meningitis | 60 (105) | 55 (101) | 18 | 15 |
| 2 | 19 | M | Ototoxic drugs | 100 | 75 (75) | 17 | 14 |
| 3 | 19 | F | Ototoxic drugs | 48 (73) | 35 (70) | 19 | 10 |
| 4 | 20 | F | Ototoxic drugs | 105 | 79 (106) | 18 | 10 |
| 5 | 19 | M | Meningitis | 41 (88) | 64 (103) | 19 | 15 |
| 6 | 24 | M | Ototoxic drugs | 70 (76) | 93 (101) | 23 | 11 |
| 7 | 24 | F | Head injury | 66 (107) | 94 (98) | 22 | 22 |
| 8 | 24 | F | Ototoxic drugs | 47 (68) | 65 (93) | 23 | 20 |
| 9 | 21 | F | Ototoxic drugs | 75 (86) | 89 | 19 | 14 |
| 10 | 20 | M | Ototoxic drugs | 69 (99) | 75 (103) | 18 | 17 |
| 11 | 21 | F | Ototoxic drugs | 86 (108) | 66 (88) | 19 | 18 |
| 12 | 19 | F | Ototoxic drugs | 69 (88) | 84 (99) | 18 | 15 |
| 13 | 20 | F | Ototoxic drugs | 96 | 83 (95) | 18 | 14 |
| 14 | 20 | F | Ototoxic drugs | 108 | 84 (110) | 18 | 11 |
| 15 | 23 | F | Ototoxic drugs | 65 (101) | 101 | 20 | 19 |