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. 2015 Nov 13;15(11):28742–28763. doi: 10.3390/s151128742

Table 1.

Decision table between fundamental frequency and azimuthal direction.

r Index 9 10 11 12 13 14 15 16 17 18 19 20
Corresponding Fund. Freq. (Hz) 2450 2205 2005 1838 1696 1575 1470 1378 1297 1225 1161 1103
Decision Length (mm) 78.4 86.3 94.1 102.0 109.8 117.7 125.6 133.4 141.3 149.1
Decision Direction (°) 336 300 264 228 192 156 120 84 48 12
Used Range in Gray graphic file with name sensors-15-28742-i001.jpg