E23A-TA , LHN


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
201008 LHN AR 94 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201007 LHN AR 744 -155 -156 -157 -158 -159 -159 -160 -161 -162 -163 -164 -164 -165 -166 -166 -164 -161 -157 -156 -156 -151
201006 LHN AR 720 -155 -156 -157 -158 -159 -160 -161 -161 -162 -163 -164 -165 -166 -166 -167 -166 -161 -157 -156 -156 -150
201005 LHN AR 742 -153 -154 -155 -156 -157 -158 -159 -159 -159 -160 -160 -161 -161 -162 -162 -162 -159 -156 -155 -153 -148
201004 LHN AR 695 -151 -152 -152 -154 -154 -156 -156 -157 -158 -158 -159 -160 -161 -162 -162 -162 -158 -153 -150 -148 -144
201003 LHN AR 744 -148 -150 -150 -152 -153 -154 -155 -156 -156 -157 -158 -159 -161 -162 -162 -161 -156 -151 -148 -147 -142
201002 LHN AR 124 -140 -143 -144 -146 -147 -148 -150 -151 -152 -154 -155 -156 -158 -159 -161 -162 -158 -153 -148 -145 -141
201001 LHN AR 91 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
200912 LHN AR 697 -142 -143 -144 -145 -146 -147 -148 -149 -150 -151 -153 -154 -155 -157 -158 -159 -156 -150 -146 -144 -141
200911 LHN AR 719 -139 -141 -142 -143 -144 -146 -148 -149 -150 -151 -153 -154 -156 -157 -159 -160 -158 -153 -148 -145 -142
200910 LHN AR 579 -142 -142 -143 -144 -145 -147 -147 -149 -150 -151 -153 -154 -156 -157 -159 -159 -156 -153 -149 -147 -142
200909 LHN AR 391 -154 -154 -155 -155 -157 -157 -158 -159 -160 -161 -161 -163 -164 -165 -165 -164 -161 -157 -156 -152 -148
200908 LHN AR 735 -154 -156 -157 -157 -158 -158 -159 -160 -160 -161 -161 -162 -162 -163 -164 -162 -159 -156 -155 -155 -151
200907 LHN AR 744 -155 -156 -158 -158 -158 -159 -160 -161 -161 -161 -162 -163 -164 -165 -165 -164 -161 -157 -155 -156 -151
200906 LHN AR 670 -157 -158 -159 -159 -160 -160 -161 -161 -161 -162 -162 -163 -164 -164 -165 -165 -161 -156 -155 -157 -151
200905 LHN AR 719 -154 -155 -156 -157 -158 -159 -159 -160 -161 -162 -162 -164 -164 -165 -166 -165 -161 -157 -156 -156 -151
200904 LHN AR 695 -152 -153 -155 -155 -156 -156 -157 -158 -159 -160 -160 -161 -161 -162 -163 -163 -159 -155 -153 -152 -147
200903 LHN AR 730 -141 -142 -143 -144 -145 -147 -148 -150 -151 -152 -153 -155 -156 -158 -159 -160 -158 -153 -150 -149 -146
200902 LHN AR 672 -139 -140 -142 -143 -144 -146 -147 -149 -150 -151 -152 -154 -155 -157 -159 -159 -157 -152 -149 -148 -143
200901 LHN AR 744 -137 -138 -139 -141 -142 -143 -145 -146 -147 -148 -149 -151 -152 -153 -154 -156 -154 -152 -148 -147 -144
200812 LHN AR 744 -137 -139 -140 -141 -142 -143 -144 -146 -147 -147 -149 -150 -151 -153 -154 -156 -155 -153 -149 -147 -144
200811 LHN AR 671 -141 -142 -143 -144 -145 -147 -147 -149 -150 -151 -152 -154 -155 -157 -158 -159 -159 -155 -149 -146 -144