SAML-IU , LH2-00


Noise Levels at Different Periods

The table below gives the decibel 10% noise level (in db) for each month in several period bands. The 10% noise level is defined as the signal level not exceeded 10% of the time, based on hourly measurements. Each entry in the table is color coded with reference to the New Low Noise Model (NLNM, Peterson, 1993):
navy, -6 db < value-NLNM < -3 db
blue, -3 db < value-NLNM < 3 db
aqua, 3 db < value-NLNM < 6 db
lime, 6 db < value-NLNM < 9 db
yellow, 9 db < value-NLNM < 12 db
orange, 12 db < value-NLNM < 15 db
red, 15 db < value-NLNM < 20 db
fuchsia, 20 db < value-NLNM < 25 db
silver, value-NLNM < -6 db, value-NLNM > 25 db

Black indicates that there was an insufficient number of hourly measurements to calculate a noise level.

Noise levels (PSD) in decibels
Month Chan. Qual. # obs. 518s 439s 373s 316s 268s 228s 193s 164s 139s 118s 100s 85s 72s 61s 52s 44s 37s 32s 27s 23s 19s 16s 14s 12s 10s
202504 LH2-00 AR 664 -127 -129 -130 -132 -134 -134 -136 -137 -138 -140 -142 -143 -145 -147 -149 -152 -154 -156 -158 -160 -159 -157 -157 -156 -151
202503 LH2-00 AR 737 -126 -127 -129 -129 -131 -132 -133 -135 -135 -138 -139 -141 -143 -145 -147 -150 -152 -154 -156 -158 -158 -156 -156 -155 -152
202502 LH2-00 AR 672 -124 -126 -127 -128 -130 -131 -132 -134 -135 -136 -138 -140 -142 -144 -145 -148 -150 -152 -154 -156 -156 -155 -154 -154 -151
202501 LH2-00 AR 744 -125 -126 -128 -129 -131 -132 -134 -135 -136 -138 -139 -141 -143 -146 -147 -149 -152 -154 -156 -158 -157 -156 -155 -155 -152
202412 LH2-00 AR 744 -123 -125 -126 -128 -130 -131 -132 -133 -135 -137 -138 -140 -142 -144 -146 -148 -151 -153 -155 -157 -157 -156 -157 -155 -154
202411 LH2-00 AR 720 -124 -125 -127 -129 -130 -131 -132 -135 -135 -137 -139 -141 -142 -144 -146 -149 -151 -153 -155 -157 -158 -157 -156 -157 -156
202410 LH2-00 AR 722 -122 -123 -125 -126 -127 -129 -131 -132 -133 -135 -137 -139 -140 -142 -144 -146 -148 -151 -153 -155 -156 -156 -155 -156 -154
202409 LH2-00 AR 720 -126 -127 -128 -130 -131 -132 -134 -135 -137 -138 -139 -141 -142 -144 -146 -148 -150 -152 -154 -156 -157 -156 -156 -156 -156
202408 LH2-00 AR 248 -127 -128 -130 -131 -133 -133 -135 -136 -138 -140 -141 -143 -144 -146 -147 -149 -151 -153 -155 -157 -159 -157 -157 -158 -157
202311 LH2-00 AR 33 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
202310 LH2-00 AR 276 -119 -121 -123 -124 -124 -127 -128 -130 -131 -133 -135 -136 -138 -140 -142 -144 -146 -149 -151 -153 -154 -152 -152 -153 -152
202309 LH2-00 AR 719 -120 -122 -123 -124 -126 -127 -129 -130 -131 -133 -135 -136 -138 -140 -142 -144 -146 -148 -150 -153 -154 -154 -154 -155 -154
202308 LH2-00 AR 403 -123 -125 -126 -128 -129 -130 -132 -133 -135 -136 -137 -139 -140 -142 -144 -146 -148 -150 -152 -154 -155 -155 -155 -157 -155
202307 LH2-00 AR 744 -124 -124 -125 -127 -128 -129 -130 -132 -133 -134 -135 -137 -138 -140 -142 -143 -146 -148 -150 -153 -154 -155 -156 -156 -154
202306 LH2-00 AR 670 -118 -118 -117 -117 -118 -118 -117 -118 -118 -119 -120 -122 -123 -126 -128 -130 -132 -134 -137 -139 -140 -139 -139 -140 -140
201909 LH2-00 AR 4 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201908 LH2-00 AR 62 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201906 LH2-00 AR 145 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201905 LH2-00 AR 488 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201904 LH2-00 AR 289 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201812 LH2-00 AR 451 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201811 LH2-00 AR 697 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201810 LH2-00 AR 684 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201809 LH2-00 AR 660 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201808 LH2-00 AR 741 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201807 LH2-00 AR 592 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201806 LH2-00 AR 720 -166 -166 -167 -169 -172 -174 -177 -179 -180 -180 -181 -181 -182 -183 -183 -182 -181 -180 -178 -174 -166 -160 -157 -158 -157
201805 LH2-00 AR 744 -166 -167 -167 -169 -172 -175 -177 -179 -180 -181 -181 -182 -183 -183 -183 -183 -181 -180 -178 -174 -168 -161 -158 -159 -156
201804 LH2-00 AR 720 -166 -166 -167 -169 -171 -174 -177 -179 -180 -180 -180 -181 -182 -183 -183 -182 -181 -180 -179 -176 -168 -162 -158 -157 -154
201803 LH2-00 AR 744 -165 -166 -167 -169 -171 -175 -177 -179 -180 -180 -181 -181 -182 -183 -182 -182 -180 -179 -177 -173 -166 -158 -154 -155 -153
201802 LH2-00 AR 64 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999