ERPA-US , 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
201105 LHN AR 45 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201104 LHN AR 720 -143 -145 -146 -148 -149 -150 -151 -152 -153 -154 -155 -157 -159 -161 -162 -163 -161 -158 -156 -154 -151
201103 LHN AR 744 -142 -143 -143 -145 -146 -147 -147 -149 -150 -152 -154 -156 -157 -160 -161 -162 -159 -156 -154 -153 -149
201102 LHN AR 672 -137 -138 -140 -141 -143 -143 -145 -147 -147 -149 -151 -153 -155 -157 -159 -160 -159 -155 -152 -152 -149
201101 LHN AR 744 -134 -135 -136 -137 -139 -140 -141 -142 -144 -146 -147 -150 -152 -155 -158 -159 -157 -153 -151 -150 -148
201012 LHN AR 744 -133 -134 -135 -136 -138 -139 -141 -142 -144 -145 -147 -149 -152 -154 -156 -157 -158 -155 -150 -148 -150
201011 LHN AR 720 -137 -138 -139 -139 -140 -141 -143 -144 -145 -146 -148 -150 -153 -155 -157 -158 -158 -155 -152 -149 -148
201010 LHN AR 707 -140 -141 -142 -143 -143 -145 -146 -146 -148 -150 -152 -153 -155 -157 -159 -160 -160 -157 -155 -153 -152
201009 LHN AR 153 -140 -141 -141 -142 -143 -144 -146 -147 -148 -149 -150 -152 -153 -155 -156 -156 -155 -154 -153 -151 -147
201005 LHN AR 161 -143 -145 -145 -147 -148 -149 -150 -151 -151 -152 -154 -154 -156 -158 -159 -159 -159 -157 -158 -158 -154
201004 LHN AR 689 -143 -144 -146 -147 -148 -150 -150 -152 -153 -155 -155 -157 -159 -160 -162 -163 -161 -158 -156 -155 -151
201003 LHN AR 735 -142 -143 -143 -144 -146 -147 -148 -149 -150 -151 -152 -154 -155 -156 -158 -158 -157 -154 -151 -151 -148
201002 LHN AR 661 -137 -138 -139 -140 -141 -142 -143 -144 -145 -146 -148 -149 -151 -153 -155 -156 -156 -154 -151 -150 -148
201001 LHN AR 694 -137 -138 -138 -139 -140 -141 -142 -142 -144 -146 -148 -149 -151 -153 -154 -155 -155 -152 -148 -147 -147
200912 LHN AR 542 -136 -137 -139 -140 -141 -142 -144 -145 -146 -147 -149 -150 -152 -153 -155 -156 -156 -152 -148 -146 -144
200911 LHN AR 692 -139 -139 -140 -142 -142 -144 -145 -147 -147 -149 -150 -152 -153 -155 -156 -158 -158 -155 -152 -150 -148
200910 LHN AR 643 -139 -140 -141 -142 -144 -145 -146 -147 -148 -149 -150 -152 -153 -155 -156 -157 -156 -155 -154 -153 -150
200909 LHN AR 482 -143 -144 -145 -146 -147 -149 -150 -151 -153 -154 -155 -157 -158 -159 -161 -162 -160 -158 -156 -153 -150
200907 LHN AR 187 -142 -144 -145 -147 -148 -149 -150 -152 -153 -155 -156 -157 -160 -160 -162 -162 -163 -159 -158 -159 -156
200906 LHN AR 654 -142 -144 -145 -146 -147 -149 -150 -151 -153 -154 -155 -157 -158 -160 -161 -162 -161 -159 -159 -159 -155
200905 LHN AR 712 -143 -143 -144 -145 -147 -148 -150 -151 -152 -153 -155 -156 -157 -159 -161 -162 -161 -159 -159 -159 -156
200904 LHN AR 688 -146 -147 -148 -149 -150 -151 -152 -153 -154 -155 -156 -157 -158 -158 -160 -161 -160 -158 -157 -157 -154
200903 LHN AR 707 -142 -143 -145 -146 -147 -148 -149 -150 -152 -153 -155 -156 -157 -159 -161 -162 -160 -157 -154 -153 -151
200902 LHN AR 670 -138 -139 -140 -141 -142 -143 -144 -146 -148 -149 -151 -153 -155 -157 -159 -161 -158 -155 -153 -153 -148
200901 LHN AR 658 -137 -139 -139 -141 -142 -144 -145 -146 -147 -149 -151 -153 -155 -157 -159 -160 -158 -154 -152 -151 -148
200812 LHN AR 720 -129 -131 -131 -132 -134 -135 -136 -138 -139 -140 -140 -142 -143 -145 -147 -149 -151 -151 -150 -150 -148
200811 LHN AR 662 -135 -136 -138 -139 -140 -141 -143 -143 -144 -145 -145 -146 -148 -149 -151 -153 -154 -153 -152 -151 -149
200810 LHN AR 734 -140 -141 -141 -143 -144 -145 -146 -148 -148 -149 -150 -152 -153 -155 -157 -157 -156 -154 -152 -151 -151
200809 LHN AR 686 -143 -144 -145 -147 -148 -149 -150 -151 -152 -153 -154 -155 -156 -158 -159 -160 -159 -157 -156 -154 -152
200808 LHN AR 95 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999