Table 2.
Experiment 1 | Experiment 2 | |
---|---|---|
T and C measurements | Measured on individual electrodes using the pulse rate over all electrodes from each condition. | |
Loudness | Matched with adjustment | Set to 70% dynamic range; near loudness equality |
Pulse rates | 250 and 159 pps/channel | 250, 720, 900, 1200, 1800 pps/channel |
Pulse width / gap | 75 μs/24 μs | 25 μs/8 μs |
Number of electrodes | 1, 3, 7, 11, 21 | 7 |
Electrode separation | Multiple separations (see text) | Neighboring electrodes, every other electrode |
Total reversals/ Reversals in threshold calculation | 14/8 | 16/10 |
All conditions were repeated 10 times and used a modified 2AFC procedure with two-down, one-up adaptive tracking. Details are provided in the text.