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 | 866 | -179 | -179 | -180 | -180 | -181 | -180 | -180 | -180 | -180 | -179 | -179 | -178 | -177 | -175 | -172 | -168 | -161 | -153 | -148 | -147 | -149 | -133 | -118 | -111 | -114 | -117 |
| 201212 | LHZ-02 | AR | 2975 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -181 | -181 | -181 | -180 | -178 | -177 | -175 | -173 | -169 | -162 | -156 | -152 | -150 | -150 | -140 | -126 | -117 | -114 | -117 |
| 201211 | LHZ-02 | AR | 2880 | -180 | -182 | -181 | -181 | -181 | -181 | -181 | -182 | -181 | -181 | -180 | -178 | -177 | -175 | -173 | -169 | -162 | -154 | -150 | -149 | -147 | -140 | -126 | -114 | -114 | -116 |
| 201210 | LHZ-02 | AR | 2976 | -181 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -183 | -182 | -181 | -180 | -178 | -176 | -174 | -171 | -164 | -159 | -154 | -152 | -151 | -146 | -137 | -126 | -118 | -117 |
| 201209 | LHZ-02 | AR | 2880 | -180 | -181 | -181 | -181 | -181 | -182 | -182 | -182 | -182 | -182 | -182 | -180 | -179 | -177 | -175 | -171 | -164 | -160 | -157 | -154 | -153 | -147 | -138 | -129 | -123 | -122 |
| 201208 | LHZ-02 | AR | 2954 | -174 | -175 | -176 | -177 | -178 | -179 | -179 | -180 | -181 | -181 | -180 | -180 | -179 | -178 | -176 | -172 | -165 | -161 | -162 | -163 | -156 | -150 | -144 | -140 | -134 | -129 |
| 201207 | LHZ-02 | AR | 2963 | -175 | -176 | -177 | -178 | -179 | -180 | -181 | -181 | -182 | -182 | -182 | -181 | -180 | -179 | -176 | -173 | -166 | -161 | -162 | -163 | -158 | -151 | -144 | -142 | -136 | -132 |
| 201206 | LHZ-02 | AR | 2728 | -180 | -181 | -181 | -181 | -182 | -182 | -182 | -183 | -183 | -183 | -183 | -182 | -181 | -180 | -177 | -173 | -166 | -161 | -163 | -164 | -161 | -152 | -145 | -143 | -138 | -134 |
| 201205 | LHZ-02 | AR | 2976 | -182 | -183 | -183 | -183 | -183 | -183 | -183 | -184 | -184 | -184 | -184 | -183 | -182 | -181 | -178 | -174 | -168 | -163 | -162 | -162 | -158 | -152 | -145 | -140 | -133 | -131 |
| 201204 | LHZ-02 | AR | 2880 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -183 | -183 | -183 | -183 | -182 | -181 | -179 | -177 | -173 | -166 | -162 | -160 | -159 | -156 | -150 | -143 | -133 | -124 | -123 |
| 201203 | LHZ-02 | AR | 2958 | -181 | -181 | -181 | -182 | -181 | -182 | -182 | -182 | -182 | -182 | -181 | -180 | -179 | -177 | -175 | -172 | -165 | -160 | -156 | -154 | -154 | -144 | -135 | -126 | -121 | -121 |
| 201202 | LHZ-02 | AR | 2743 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -183 | -183 | -182 | -181 | -180 | -178 | -177 | -174 | -171 | -164 | -157 | -153 | -152 | -151 | -144 | -130 | -120 | -118 | -119 |
| 201201 | LHZ-02 | AR | 2832 | -181 | -181 | -182 | -181 | -181 | -181 | -181 | -181 | -181 | -181 | -180 | -178 | -177 | -175 | -173 | -168 | -161 | -156 | -152 | -151 | -149 | -140 | -124 | -116 | -114 | -117 |
| 201112 | LHZ-02 | AR | 2976 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -181 | -180 | -178 | -177 | -175 | -173 | -170 | -164 | -156 | -151 | -150 | -149 | -138 | -123 | -117 | -117 | -117 |
| 201111 | LHZ-02 | AR | 2880 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -182 | -181 | -180 | -179 | -177 | -175 | -173 | -170 | -163 | -156 | -151 | -150 | -148 | -138 | -125 | -118 | -115 | -117 |
| 201110 | LHZ-02 | AR | 2976 | -182 | -182 | -182 | -182 | -182 | -183 | -182 | -183 | -183 | -182 | -181 | -180 | -178 | -176 | -174 | -170 | -163 | -157 | -153 | -151 | -149 | -145 | -130 | -120 | -116 | -116 |
| 201109 | LHZ-02 | AR | 2880 | -181 | -181 | -181 | -181 | -181 | -182 | -182 | -182 | -182 | -182 | -181 | -180 | -179 | -177 | -175 | -171 | -165 | -159 | -156 | -154 | -152 | -146 | -135 | -129 | -122 | -120 |
| 201108 | LHZ-02 | AR | 1771 | -180 | -181 | -181 | -181 | -182 | -182 | -182 | -183 | -183 | -183 | -183 | -182 | -180 | -179 | -176 | -173 | -166 | -161 | -161 | -162 | -158 | -149 | -143 | -141 | -134 | -128 |