Table 3.
Experiment | Soft | Firm | Extra firm | Contrast ratios | ||||
---|---|---|---|---|---|---|---|---|
(kPa) | σ (kPa) | (kPa) | σ (kPa) | (kPa) | σ (kPa) | Firm∕soft | Extra firm∕soft | |
MRPE (28.5 mm dia.) | 4.614 | 2.264 | 10.611 | 3.058 | 14.153 | 2.606 | 2.30 | 3.07 |
MRPE (19.0 mm dia.) | 4.477 | 2.080 | 9.396 | 3.420 | 14.109 | 4.142 | 2.10 | 3.15 |
MRPE (12.5 mm dia.) | 4.782 | 2.437 | 5.127 | 2.934 | 7.119 | 3.645 | 1.07 | 1.49 |
Quasistatic | 0.887 | 0.053 | 1.985 | 0.110 | 2.339 | 0.195 | 2.24 | 2.64 |
Viscoelastic (100 Hz) | 6.368 | 0.390 | 16.051 | 0.663 | 21.889 | 1.846 | 2.52 | 3.44 |