TABLE I.
Average speech understanding scores (in RAUs) in each condition and average PR benefits are presented, rounded to the nearest tenth. SDs are in parentheses. PR benefits were calculated by subtracting each participant's scores in the SG-interrupted condition from their score in the associated NB-interrupted condition; the averaged values of these PR benefits are listed. Asterisks indicate significant PR benefits per paired samples t-tests (comparing performance on SG conditions to each noise condition) by group (α = 0.005). Blank boxes indicate untested conditions.
| BKBs | Unprocessed | Noise Vocoded | ||||
|---|---|---|---|---|---|---|
| 32 channels | 16 channels | |||||
| YNH | ONH | YNH | ONH | YNH | ONH | |
| SG | 90.7 (13.7) | 72.2 (16.9) | 57.5 (11.4) | 38.5 (14.7) | 44.5 (14.6) | 25.1 (10.1) |
| NBAV or NB | 94.7 (14.5) | 83.9 (20.5) | 75.4 (11.3) | 56.9 (13.3) | 55.8 (12.9) | 36.9 (19.1) |
| NBBV | 60.0 (11.2) | 50.6 (15.1) | 48.1 (14.1) | 34.0 (15.7) | ||
| PR benefit (NBAV−SG) or (NB−SG) | 4.0 (18.0) | 11.7 (17.8) | 17.9* (18.2) | 18.4* (17.2) | 11.3 (18.3) | 11.8 (20.7) |
| PR benefit (NBBV−SG) | 2.6 (17.0) | 12.0* (13.5) | 3.7 (16.6) | 8.9 (15.3) | ||
| IEEEs | Unprocessed | Noise Vocoded | ||||
|---|---|---|---|---|---|---|
| 32 channels | 16 channels | |||||
| YNH | ONH | YNH | ONH | YNH | ONH | |
| SG | 57.7 (17.6) | 42.4 (16.3) | 22.4 (12.9) | 7.3 (9.5) | 15.1 (12.5) | 4.7 (10.8) |
| NBAV or NB | 66.0 (12.9) | 59.8 (14.0) | 36.6 (12.3) | 28.6 (12.0) | 23.5 (13.4) | 19.8 (12.2) |
| NBBV | 30.8 (10.8) | 23.2 (12.9) | 19.2 (14.0) | 17.5 (10.7) | ||
| PR benefit (NBAV−SG) or (NB−SG) | 8.3 (16.7) | 17.4* (16.5) | 14.2* (15.0) | 21.3* (12.0) | 8.4 (11.8) | 15.2* (10.1) |
| PR benefit (NBBV−SG) | 8.5 (12.9) | 15.8* (11.0) | 4.1 (14.5) | 12.9* (10.6) | ||