BNLO-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
200709 LHN AR 41 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
200708 LHN AR 726 -158 -158 -159 -159 -159 -159 -159 -159 -159 -160 -160 -160 -161 -162 -164 -163 -159 -154 -155 -156 -153
200707 LHN AR 733 -157 -157 -157 -157 -157 -157 -157 -157 -157 -158 -158 -158 -159 -160 -161 -162 -160 -155 -154 -155 -151
200706 LHN AR 513 -154 -154 -154 -153 -153 -152 -150 -150 -150 -149 -150 -150 -150 -151 -153 -154 -154 -152 -152 -154 -150
200705 LHN AR 488 -152 -154 -153 -153 -152 -152 -152 -152 -152 -152 -153 -154 -154 -155 -157 -158 -157 -152 -153 -154 -149
200704 LHN AR 659 -153 -153 -153 -152 -152 -150 -150 -150 -149 -149 -149 -149 -150 -150 -151 -151 -150 -147 -146 -146 -141
200703 LHN AR 662 -153 -153 -153 -153 -153 -152 -152 -152 -152 -153 -154 -155 -156 -157 -158 -159 -156 -150 -149 -150 -145
200702 LHN AR 666 -144 -145 -145 -146 -146 -147 -147 -148 -149 -150 -151 -151 -153 -153 -154 -155 -153 -148 -145 -146 -142
200701 LHN AR 738 -141 -142 -142 -143 -143 -144 -145 -146 -147 -148 -149 -149 -151 -152 -153 -153 -151 -146 -146 -147 -140
200612 LHN AR 740 -142 -142 -143 -143 -144 -145 -145 -146 -148 -149 -150 -151 -153 -154 -155 -156 -153 -148 -147 -147 -142
200611 LHN AR 719 -150 -150 -150 -150 -151 -151 -151 -151 -152 -153 -154 -155 -157 -158 -158 -159 -157 -152 -149 -147 -145
200610 LHN AR 744 -158 -158 -159 -160 -160 -158 -158 -159 -159 -159 -159 -160 -160 -161 -162 -162 -159 -154 -151 -151 -148
200609 LHN AR 720 -159 -158 -161 -157 -159 -159 -160 -162 -162 -162 -163 -163 -163 -164 -165 -163 -158 -153 -153 -154 -146
200608 LHN AR 744 -158 -158 -159 -156 -158 -158 -159 -160 -160 -160 -161 -161 -162 -163 -165 -164 -160 -155 -155 -157 -151
200607 LHN AR 744 -156 -156 -156 -155 -155 -155 -156 -156 -155 -155 -156 -156 -157 -158 -159 -160 -157 -153 -153 -153 -147
200606 LHN AR 695 -155 -154 -155 -154 -154 -153 -153 -154 -153 -152 -152 -153 -153 -154 -155 -156 -155 -151 -152 -154 -144
200605 LHN AR 744 -152 -151 -153 -152 -153 -152 -151 -151 -150 -150 -149 -150 -151 -152 -152 -153 -153 -150 -150 -150 -145
200604 LHN AR 671 -148 -149 -150 -150 -151 -150 -150 -151 -152 -152 -152 -153 -155 -156 -157 -159 -157 -153 -151 -150 -146
200603 LHN AR 744 -142 -142 -143 -144 -145 -146 -146 -148 -149 -149 -150 -151 -152 -153 -154 -154 -154 -149 -146 -146 -144
200602 LHN AR 640 -146 -148 -148 -149 -150 -151 -152 -153 -154 -155 -156 -157 -158 -159 -160 -159 -155 -149 -148 -149 -145
200601 LHN AR 742 -144 -145 -146 -147 -147 -148 -149 -149 -150 -150 -151 -152 -152 -153 -155 -155 -151 -147 -145 -145 -137