% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 226 169 142 137 97 114 187 322 568 1151 679 600 381 199 235 278 203 301 237 426 369 343 377 208 230 185 214 149 96 185 132 77 159 117 122 179 127 77 105 64 75 63 96 51 47 74 48 83 42 39 54 54 33 51 40 44 26 33 18 39 45 34 27 -16 44 22 50 38 44 36 29 35 33 33 38 27 34 38 8 25 42 20 34 43 40 35 12 -18 31 30 -11 16 16 29 30 -11 20 36 34 -6 8 -22 12 -22 -19 -12 -18 26 2 22 25 -16 -6 -15 -17 -11 -26 -10 29 17 -29 11 5 -21 -20 35 -28 -12