% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 127 75 81 86 90 112 56 111 292 256 332 377 282 233 263 610 324 303 222 353 231 191 152 292 208 236 204 196 163 115 131 156 199 93 97 167 134 117 120 142 130 86 75 137 157 130 118 110 102 95 88 58 112 125 82 85 109 87 53 67 82 78 95 39 63 78 42 59 58 51 29 -24 -11 42 37 47 37 24 29 21 32 -11 39 30 18 -22 -19 33 30 41 18 -31 12 -29 -31 19 -28 -28 12 -9 3 16 21 13 -10 -19 -20 16 -16 9 13 22 -23 -24 21 -6 -25 35 -32 19 -16 37 31 30 -25 25 -16 -17