TABLE 2.
Upper limits of temporal pitch, slopes of increase of the temporal pitch-rank functions above 300 pps and current levels needed for MCLs obtained in experiments 1 and 2
Experiment | Analysis | Condition | S1 | S2 | S3 | S4 | S5 | S6 | S7 |
---|---|---|---|---|---|---|---|---|---|
Experiment 1 (bipolar) | Upper limits (pps) | PSA-Apex | 563 | 776 | 859 | 602 | 732 | 859 | 209 |
SYM-Apex | 363 | 790 | 620 | 355 | 644 | 595 | 216 | ||
SYM-Middle | 399 | 388 | 515 | 707 | 258 | 361 | 258 | ||
Slopes | PSA-Apex | 0.5 | 0.89 | 0.87 | 0.56 | 0.64 | 0.87 | −0.33 | |
SYM-Apex | 0.04 | 0.92 | 0.56 | 0 | 0.46 | 0.55 | −0.62 | ||
SYM-Middle | −0.07 | 0.2 | 0.3 | 0.75 | −0.38 | 0.07 | −0.08 | ||
Experiment 1 (monopolar) | Upper limits (pps) | PSA-Apex | 344 | 547 | 859 | 517 | – | 859 | – |
SYM-Apex | 484 | 859 | 859 | 310 | – | 859 | – | ||
SYM-Middle | 543 | 436 | 469 | 615 | – | 297 | – | ||
Slopes | PSA-Apex | −0.22 | 0.58 | 1 | 0.47 | – | 0.82 | – | |
SYM-Apex | 0.24 | 0.9 | 1 | 0.32 | – | 0.82 | – | ||
SYM-Middle | 0.52 | 0.33 | 0.29 | 0.69 | – | 0.02 | – | ||
Experiment 2 (bipolar) | Upper limits (pps) | PSA-Apex | 684 | 832 | 798 | 1,146 | 1,001 | 859 | – |
PSC-Apex | 430 | 619 | 350 | 366 | 801 | 801 | – | ||
PSA-Middle | 447 | 461 | 543 | 699 | 329 | 442 | – | ||
SYM-Middle | 469 | 389 | 396 | 613 | 344 | 258 | – | ||
Slopes | PSA-Apex | 0.67 | 0.66 | 0.68 | 0.84 | 0.81 | 0.89 | – | |
PSC-Apex | 0.23 | 0.49 | −0.13 | 0.2 | 0.61 | 0.75 | – | ||
PSA-Middle | 0.13 | 0.41 | 0.54 | 0.72 | 0.29 | 0.32 | – | ||
SYM-Middle | 0.34 | 0.21 | −0.25 | 0.68 | −0.65 | 0.08 | – | ||
MCLs (dB re 1 mA) | PSA-Apex | −3.88 | −4.79 | −7.29 | −6.38 | −4.55 | −6.23 | – | |
PSC-Apex | −3.05 | −3.45 | −6.38 | −5.55 | −3.45 | −5.55 | – | ||
PSA-Middle | −2.86 | −0.95 | −6.97 | −6.67 | −3.45 | −1.27 | – | ||
SYM-Middle | −3.88 | −1.43 | −6.9 | −6.97 | −3.05 | −2.57 | – |
The slopes of three apical stimuli of experiment 1 (PSA-Apex, SYM-Apex and SYM-Apex-Monop) were compared by calculating t values (cf. “Appendix”). PSA-Apex showed significantly greater slopes than SYM-Apex for S1, S3, S4 and S6 (p < 0.001) and no difference for S2 and S5. PSA-Apex also showed greater slopes than SYM-Apex-Monop for S1 and S4 (p < 0.05), no difference for S2 and S6 and a significantly smaller slope for S3 (p < 0.01). Finally, the slopes obtained with SYM-Apex-Monop were significantly greater than those obtained with SYM-Apex for S3, S4 and S6 (p < 0.01) but showed no difference for S1 and S2