Table 1.
Mean and standard deviation values for the sound field thresholds, speech identification scores and signal to noise ratio-50 scores obtained in unaided and three aided conditions.
| Condition | Sound field thresholds (dB) (mean, SD) | SIS (max=25) (mean, SD) | SNR-50 (mean, SD) | ||||
|---|---|---|---|---|---|---|---|
| 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz | D | ID | ||
| Unaided | 53.12 | 51.87 | 51.46 | 64.37 | 0.00 | –5.67 | 3.12 |
| (10.61) | (7.34) | (11.56) | (10.03) | (6.80) | (6.01) | ||
| BAHA 1 | 15.42 | 20.21 | 19.37 | 30.21 | 23.08 | –4.87 | 1.17 |
| (9.43) | (11.08) | (11.64) | (14.70) | (2.28) | (6.40) | (5.48) | |
| BAHA 2 | 17.29 | 17.92 | 26.25 | 49.17 | 22.46 | –6.37 | 2.33 |
| (9.89) | (12.42) | (13.53) | (16.26) | (3.20) | (5.39) | (6.25) | |
| T-CROS | 38.33 | 20.42 | 22.71 | 43.96 | 18.29 | –6.37 | 3.04 |
| (9.40) | (10.62) | (10.93) | (19.72) | (4.51) | (5.45) | (6.15) | |
SIS, speech identification scores; SNR-50, signal to noise ratio-50; SD, standard deviation; D, direct condition; ID, indirect condition; BAHA, bone anchored hearing aid; T-CROS, transcranial contralateral routing of offside signal.