% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 88 62 57 46 32 38 34 80 48 83 73 162 237 346 379 382 457 242 332 488 343 360 268 459 224 271 293 186 220 233 145 103 85 141 102 92 77 90 129 72 104 95 86 93 83 116 110 95 79 123 111 72 90 96 83 64 55 56 42 57 73 34 78 43 52 34 57 34 30 35 33 47 37 35 25 58 42 41 40 40 23 31 27 29 45 12 16 18 10 9 25 15 18 20 13 -8 6 -4 16 29 -17 -10 -9 15 6 9 19 13 -15 12 17 -18 7 8 6 -12 -15 -8 8 14 1 15 -19 -23 -17 -16 -12 16