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.
| 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 | LHE-00 | AR | 841 | -149 | -150 | -151 | -153 | -154 | -155 | -158 | -160 | -162 | -164 | -166 | -168 | -169 | -169 | -169 | -168 | -162 | -154 | -148 | -148 | -147 | -131 | -113 | -107 | -110 | -116 |
| 200911 | LHE-00 | AR | 2880 | -153 | -153 | -155 | -156 | -158 | -159 | -161 | -163 | -164 | -166 | -168 | -170 | -172 | -172 | -172 | -172 | -167 | -161 | -155 | -153 | -151 | -146 | -132 | -122 | -119 | -119 |
| 200910 | LHE-00 | AR | 2976 | -163 | -164 | -166 | -167 | -168 | -170 | -172 | -173 | -174 | -176 | -177 | -178 | -177 | -177 | -175 | -172 | -166 | -160 | -157 | -154 | -153 | -148 | -136 | -128 | -120 | -120 |
| 200909 | LHE-00 | AR | 2880 | -167 | -169 | -170 | -171 | -173 | -174 | -175 | -177 | -178 | -179 | -180 | -180 | -179 | -179 | -177 | -175 | -169 | -163 | -162 | -158 | -156 | -152 | -146 | -138 | -127 | -123 |
| 200908 | LHE-00 | AR | 2976 | -169 | -170 | -171 | -172 | -174 | -175 | -176 | -177 | -179 | -180 | -180 | -180 | -180 | -179 | -177 | -175 | -169 | -163 | -162 | -163 | -160 | -153 | -146 | -144 | -138 | -132 |
| 200907 | LHE-00 | AR | 2797 | -169 | -170 | -171 | -172 | -174 | -175 | -176 | -177 | -178 | -179 | -180 | -180 | -180 | -180 | -179 | -176 | -170 | -163 | -163 | -163 | -161 | -156 | -151 | -145 | -137 | -134 |
| 200906 | LHE-00 | AR | 2879 | -168 | -169 | -171 | -172 | -173 | -174 | -175 | -177 | -177 | -179 | -179 | -179 | -180 | -180 | -179 | -176 | -170 | -163 | -163 | -165 | -162 | -156 | -151 | -148 | -141 | -139 |
| 200905 | LHE-00 | AR | 2972 | -165 | -167 | -167 | -169 | -169 | -170 | -172 | -175 | -176 | -176 | -177 | -178 | -179 | -179 | -178 | -175 | -169 | -163 | -161 | -161 | -161 | -153 | -145 | -139 | -132 | -130 |
| 200904 | LHE-00 | AR | 2878 | -171 | -172 | -174 | -175 | -176 | -177 | -178 | -179 | -180 | -181 | -182 | -182 | -182 | -182 | -180 | -176 | -170 | -163 | -162 | -160 | -157 | -150 | -142 | -133 | -127 | -127 |
| 200903 | LHE-00 | AR | 2973 | -162 | -164 | -165 | -167 | -169 | -171 | -172 | -174 | -176 | -177 | -178 | -180 | -180 | -179 | -178 | -176 | -169 | -162 | -158 | -156 | -156 | -149 | -132 | -124 | -120 | -122 |
| 200902 | LHE-00 | AR | 2592 | -160 | -162 | -164 | -165 | -167 | -169 | -171 | -173 | -174 | -176 | -177 | -178 | -178 | -178 | -177 | -174 | -167 | -160 | -156 | -154 | -154 | -145 | -128 | -119 | -119 | -121 |
| 200901 | LHE-00 | AR | 2973 | -160 | -161 | -163 | -165 | -167 | -169 | -171 | -173 | -174 | -176 | -177 | -178 | -178 | -177 | -176 | -173 | -166 | -159 | -153 | -152 | -150 | -142 | -126 | -118 | -117 | -121 |