Table 1: The Normalized RMS Amplitudes of SEMG Signals Collected from 8 Subjects in the Tests of Ultrasound Coupling Gel Area

Subject RMS of SEMG
GA = 1×1 cm2 GA = 2×3 cm2 GA = 2×5 cm2 GA = 3×8 cm2
1 0.066 0.011 0.164 0.022
2 0.276 0.844 0.489 0.397
3 0.208 0.077 0.306 0.437
4 0.194 0.016 0.050 0.200
5 0.035 -0.001 -0.040 0.056
6 -0.236 -0.251 -0.199 -0.186
7 0.034 -0.018 -0.138 -0.144
8 -0.100 0.311 0.405 0.238
Mean 0.043 0.121 0.130 0.128
SD 0.175 0.330 0.254 0.231

GA: gel area.