Table IV.
Individual performance for each subject on CUNY Sentences (dB SNR re: 50% SRT), TIMIT Sentences (% correct) and Vowel recognition in quiet (% correct) for the 8 and 20 channel conditions. The difference between performance using the 8 and 20 channel maps (“Change”) is also shown.
| CUNY Sentences (dB SNR) | TIMIT Sentences (%) | Vowels in quiet (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 8-channel | 20-channel | Change | 8-channel | 20-channel | Change | 8-channel | 20-channel | Change | |
| S60R | 6.85 | 3.42 | +3.17 | 59.24 | 69.18 | −9.94 | 68.75 | 75.00 | −6.25 |
| S60L | 6.03 | 3.75 | +2.29 | 56.75 | 64.68 | −7.93 | 81.25 | 79.68 | +1.57 |
| S85 | 11.16 | 7.92 | −3.24 | 53.29 | 60.09 | −6.80 | 69.27 | 75.52 | −6.25 |
| S86 | 10.78 | 12.02 | −1.24 | 46.31 | 53.15 | −6.84 | 70.31 | 69.27 | +1.04 |
| S98 | 10.06 | 7.92 | +2.14 | 51.71 | 68.18 | −16.46 | 77.18 | 73.43 | +3.74 |
| S99 | 10.50 | 4.71 | +5.79 | 43.60 | 56.91 | −13.30 | 46.88 | 76.04 | −29.16 |
| S100 | 12.64 | 7.98 | +4.66 | 40.36 | 48.99 | −8.63 | 63.54 | 80.73 | −17.19 |
| S103 | 9.38 | 5.95 | +3.43 | 35.04 | 49.81 | −14.77 | 52.65 | 47.91 | +4.73 |
| AVG | 9.67 | 6.70 | +2.12 | 48.28 | 58.87 | −10.58 | 66.22 | 72.19 | −5.97 |
| SD | 2.21 | 2.85 | 2.99 | 8.38 | 7.96 | 3.76 | 11.61 | 10.43 | 11.8 |
Note that a decrement in performance as the number of channels was decreased from 20 to 8 is indicated with negative (−) change for TIMIT and Vowel stimuli but a positive (+) change for CUNY sentences. Average (AVG) and standard deviations (SD) for the group of subjects are provided for each condition, for each speech test.