SFJD-IU , LHN-10


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. 268s 228s 193s 164s 139s 118s 100s 85s 72s 61s 52s 44s 37s 32s 27s 23s 19s 16s 14s 12s 10s 8s 7s 6s 5s 4s
200912 LHN-10 AR 841 -165 -166 -166 -169 -171 -171 -172 -174 -176 -177 -177 -177 -176 -174 -172 -168 -160 -152 -146 -146 -147 -131 -116 -110 -114 -119
200911 LHN-10 AR 2880 -166 -167 -168 -170 -171 -172 -174 -175 -176 -178 -178 -178 -177 -176 -174 -171 -166 -159 -153 -150 -151 -147 -134 -125 -122 -122
200910 LHN-10 AR 2976 -167 -168 -169 -171 -172 -173 -174 -175 -176 -177 -177 -177 -176 -175 -173 -170 -164 -158 -156 -152 -152 -148 -138 -131 -123 -124
200909 LHN-10 AR 2880 -167 -169 -170 -171 -173 -173 -175 -176 -177 -178 -178 -178 -177 -176 -175 -173 -168 -162 -160 -156 -155 -153 -147 -139 -129 -126
200908 LHN-10 AR 2976 -167 -169 -170 -172 -173 -174 -175 -176 -177 -178 -179 -179 -178 -177 -176 -173 -168 -162 -161 -162 -160 -153 -148 -146 -140 -133
200907 LHN-10 AR 2797 -154 -157 -159 -161 -163 -166 -167 -169 -171 -173 -174 -175 -176 -177 -176 -174 -169 -163 -162 -162 -161 -156 -151 -146 -139 -137
200906 LHN-10 AR 2879 -159 -161 -163 -165 -166 -168 -170 -172 -173 -174 -176 -176 -177 -178 -177 -175 -169 -163 -163 -164 -162 -156 -151 -148 -141 -139
200905 LHN-10 AR 2972 -166 -168 -170 -172 -174 -174 -176 -177 -179 -180 -181 -181 -180 -180 -178 -175 -168 -162 -160 -161 -159 -154 -146 -141 -134 -132
200904 LHN-10 AR 2878 -175 -177 -179 -179 -180 -180 -181 -182 -183 -184 -184 -183 -182 -181 -179 -175 -168 -163 -161 -158 -156 -150 -143 -135 -130 -129
200903 LHN-10 AR 2973 -173 -174 -175 -176 -177 -178 -178 -176 -181 -182 -182 -181 -180 -179 -177 -173 -167 -160 -156 -153 -155 -149 -134 -127 -123 -124
200902 LHN-10 AR 2592 -169 -171 -172 -173 -174 -176 -176 -177 -179 -180 -180 -180 -179 -178 -176 -172 -165 -158 -153 -151 -153 -145 -130 -121 -121 -123
200901 LHN-10 AR 2973 -169 -171 -172 -174 -175 -176 -176 -177 -179 -180 -180 -179 -177 -176 -174 -171 -165 -157 -151 -149 -150 -143 -127 -119 -119 -123