% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 127 109 106 80 70 78 75 85 115 195 197 352 339 314 235 180 200 164 182 267 302 362 312 342 328 293 193 140 223 131 108 103 90 113 118 120 107 93 49 50 50 78 48 73 41 30 31 46 20 42 45 29 31 22 35 20 21 40 7 -16 15 -12 17 -20 20 23 -13 22 -14 28 20 30 16 27 9 -17 13 33 6 13 22 27 33 13 7 30 6 -21 19 20 21 17 -18 -14 31 -13 12 -7 16 18 -20 0 4 -22 -12 -13 18 -2 -22 -17 -13 6 -15 -9 19 33 -16 17 10 20 -9 -4 8 -20 16 -1 -26 17