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. | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 202601 | LHZ-00 | AR | 439 | -174 | -174 | -172 | -170 | -169 | -166 | -163 | -162 | -159 | -159 | -161 | -163 | -159 | -152 | -150 | -149 | -147 | -144 | -141 | -136 | -129 | -121 | -116 | -116 | -115 |
| 202512 | LHZ-00 | AR | 743 | -174 | -174 | -173 | -171 | -170 | -166 | -164 | -161 | -159 | -159 | -161 | -163 | -159 | -152 | -150 | -149 | -147 | -144 | -141 | -136 | -129 | -119 | -115 | -114 | -112 |
| 202511 | LHZ-00 | AR | 720 | -173 | -173 | -172 | -171 | -169 | -165 | -162 | -160 | -158 | -158 | -159 | -161 | -157 | -150 | -148 | -148 | -146 | -143 | -140 | -135 | -128 | -121 | -116 | -112 | -109 |
| 202510 | LHZ-00 | AR | 566 | -172 | -172 | -171 | -170 | -167 | -163 | -160 | -158 | -156 | -155 | -157 | -159 | -156 | -149 | -147 | -147 | -145 | -142 | -138 | -132 | -125 | -119 | -115 | -113 | -109 |
| 202509 | LHZ-00 | AR | 507 | -169 | -170 | -170 | -169 | -166 | -162 | -159 | -156 | -153 | -152 | -154 | -156 | -153 | -147 | -145 | -145 | -144 | -141 | -137 | -131 | -124 | -116 | -111 | -108 | -107 |
| 202507 | LHZ-00 | AR | 487 | -173 | -173 | -171 | -170 | -169 | -165 | -162 | -160 | -157 | -156 | -157 | -159 | -156 | -149 | -147 | -146 | -145 | -142 | -138 | -132 | -124 | -116 | -111 | -108 | -107 |
| 202506 | LHZ-00 | AR | 720 | -172 | -172 | -171 | -170 | -168 | -164 | -160 | -159 | -156 | -156 | -156 | -158 | -155 | -148 | -146 | -145 | -143 | -141 | -137 | -131 | -124 | -117 | -111 | -109 | -108 |
| 202505 | LHZ-00 | AR | 742 | -170 | -170 | -169 | -167 | -165 | -161 | -158 | -156 | -153 | -153 | -154 | -156 | -154 | -147 | -145 | -144 | -143 | -140 | -136 | -131 | -122 | -115 | -111 | -109 | -105 |
| 202504 | LHZ-00 | AR | 566 | -155 | -156 | -156 | -156 | -155 | -154 | -152 | -152 | -151 | -152 | -155 | -158 | -155 | -148 | -146 | -146 | -144 | -142 | -137 | -130 | -122 | -114 | -112 | -111 | -107 |
| 202502 | LHZ-00 | AR | 578 | -168 | -168 | -169 | -167 | -167 | -164 | -161 | -159 | -156 | -156 | -158 | -159 | -159 | -151 | -149 | -149 | -146 | -143 | -140 | -134 | -126 | -118 | -114 | -112 | -111 |
| 202501 | LHZ-00 | AR | 731 | -168 | -169 | -169 | -168 | -166 | -163 | -160 | -158 | -155 | -155 | -157 | -159 | -159 | -152 | -149 | -148 | -146 | -143 | -139 | -132 | -125 | -118 | -115 | -116 | -115 |