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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 201301 | LHZ-02 | AR | 864 | -170 | -173 | -175 | -177 | -179 | -180 | -181 | -181 | -181 | -181 | -180 | -179 | -177 | -176 | -173 | -170 | -162 | -156 | -151 | -151 | -152 | -137 | -124 | -118 | -121 | -124 |
| 201212 | LHZ-02 | AR | 2975 | -171 | -174 | -176 | -178 | -179 | -180 | -181 | -182 | -182 | -181 | -180 | -179 | -177 | -176 | -174 | -171 | -164 | -157 | -154 | -154 | -154 | -143 | -131 | -123 | -121 | -124 |
| 201211 | LHZ-02 | AR | 2880 | -171 | -174 | -176 | -178 | -180 | -181 | -182 | -182 | -182 | -182 | -181 | -180 | -178 | -176 | -174 | -171 | -164 | -157 | -153 | -152 | -152 | -144 | -130 | -121 | -120 | -122 |
| 201210 | LHZ-02 | AR | 2976 | -171 | -174 | -176 | -179 | -180 | -181 | -182 | -183 | -184 | -183 | -182 | -181 | -179 | -177 | -175 | -171 | -165 | -160 | -157 | -155 | -154 | -146 | -139 | -131 | -124 | -123 |
| 201209 | LHZ-02 | AR | 2879 | -170 | -173 | -176 | -178 | -180 | -181 | -182 | -183 | -184 | -184 | -183 | -181 | -180 | -178 | -176 | -172 | -165 | -160 | -159 | -156 | -154 | -147 | -141 | -134 | -127 | -126 |
| 201208 | LHZ-02 | AR | 2970 | -168 | -172 | -174 | -177 | -179 | -181 | -182 | -183 | -184 | -183 | -183 | -182 | -180 | -179 | -176 | -172 | -166 | -162 | -163 | -164 | -158 | -150 | -144 | -140 | -134 | -131 |
| 201207 | LHZ-02 | AR | 2161 | -167 | -171 | -174 | -176 | -178 | -180 | -181 | -182 | -183 | -183 | -182 | -182 | -180 | -179 | -177 | -173 | -167 | -163 | -163 | -165 | -159 | -150 | -144 | -142 | -136 | -133 |
| 201206 | LHZ-02 | AR | 2586 | -167 | -170 | -172 | -175 | -177 | -179 | -180 | -181 | -182 | -182 | -182 | -181 | -180 | -179 | -177 | -173 | -166 | -162 | -163 | -165 | -161 | -150 | -145 | -142 | -135 | -132 |
| 201205 | LHZ-02 | AR | 2976 | -169 | -171 | -174 | -177 | -179 | -180 | -181 | -182 | -183 | -183 | -183 | -182 | -181 | -179 | -177 | -174 | -168 | -163 | -163 | -163 | -160 | -151 | -144 | -140 | -134 | -131 |
| 201204 | LHZ-02 | AR | 2880 | -169 | -172 | -175 | -177 | -179 | -181 | -182 | -183 | -184 | -184 | -183 | -182 | -181 | -179 | -177 | -173 | -167 | -162 | -161 | -160 | -158 | -149 | -142 | -137 | -129 | -128 |
| 201203 | LHZ-02 | AR | 2976 | -168 | -171 | -174 | -176 | -178 | -179 | -180 | -181 | -182 | -181 | -181 | -180 | -178 | -176 | -174 | -171 | -165 | -160 | -157 | -155 | -155 | -144 | -134 | -130 | -126 | -127 |
| 201202 | LHZ-02 | AR | 2784 | -170 | -173 | -175 | -178 | -179 | -180 | -181 | -182 | -182 | -182 | -181 | -180 | -178 | -176 | -174 | -170 | -164 | -157 | -154 | -153 | -153 | -142 | -133 | -125 | -123 | -125 |
| 201201 | LHZ-02 | AR | 2976 | -169 | -173 | -175 | -177 | -179 | -180 | -181 | -182 | -182 | -181 | -180 | -179 | -177 | -176 | -174 | -169 | -162 | -157 | -154 | -153 | -152 | -142 | -129 | -122 | -121 | -124 |
| 201112 | LHZ-02 | AR | 2976 | -172 | -174 | -176 | -178 | -179 | -181 | -181 | -182 | -182 | -182 | -181 | -179 | -178 | -176 | -173 | -170 | -164 | -157 | -151 | -152 | -152 | -140 | -126 | -122 | -122 | -123 |
| 201111 | LHZ-02 | AR | 2880 | -171 | -173 | -176 | -178 | -179 | -180 | -181 | -182 | -182 | -182 | -181 | -180 | -178 | -176 | -174 | -171 | -164 | -157 | -153 | -153 | -152 | -140 | -129 | -124 | -122 | -124 |
| 201110 | LHZ-02 | AR | 2976 | -170 | -173 | -175 | -177 | -179 | -181 | -181 | -183 | -183 | -182 | -182 | -180 | -178 | -177 | -174 | -170 | -164 | -159 | -155 | -153 | -153 | -147 | -132 | -126 | -121 | -123 |
| 201109 | LHZ-02 | AR | 2880 | -169 | -171 | -174 | -177 | -179 | -180 | -181 | -182 | -183 | -183 | -182 | -181 | -179 | -178 | -175 | -171 | -166 | -161 | -157 | -155 | -155 | -147 | -138 | -132 | -128 | -126 |
| 201108 | LHZ-02 | AR | 2976 | -167 | -171 | -173 | -176 | -178 | -180 | -181 | -182 | -183 | -183 | -183 | -182 | -180 | -178 | -176 | -172 | -167 | -162 | -162 | -164 | -159 | -149 | -143 | -140 | -134 | -131 |
| 201107 | LHZ-02 | AR | 1280 | -179 | -178 | -171 | -172 | -174 | -176 | -178 | -179 | -180 | -181 | -180 | -180 | -178 | -177 | -174 | -172 | -167 | -162 | -162 | -162 | -161 | -153 | -145 | -140 | -133 | -130 |