B18A-TA , LHZ


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
200909 LHZ AR 86 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
200908 LHZ AR 744 -174 -175 -177 -177 -178 -179 -179 -180 -180 -180 -180 -180 -179 -178 -175 -172 -165 -159 -159 -161 -158
200907 LHZ AR 744 -174 -176 -177 -178 -178 -179 -180 -180 -180 -180 -180 -180 -179 -178 -176 -172 -166 -160 -158 -160 -157
200906 LHZ AR 670 -176 -177 -178 -179 -179 -180 -180 -180 -181 -181 -181 -180 -180 -178 -176 -173 -165 -158 -158 -161 -155
200905 LHZ AR 719 -176 -177 -178 -179 -179 -179 -180 -180 -181 -181 -180 -180 -179 -177 -175 -171 -164 -159 -160 -161 -157
200904 LHZ AR 695 -177 -178 -179 -179 -179 -180 -180 -181 -181 -181 -181 -180 -179 -178 -176 -172 -164 -158 -157 -157 -154
200903 LHZ AR 730 -178 -178 -179 -179 -180 -180 -180 -180 -181 -181 -181 -179 -178 -176 -174 -170 -164 -157 -154 -153 -151
200902 LHZ AR 672 -178 -179 -180 -180 -180 -181 -181 -181 -182 -181 -181 -180 -179 -177 -174 -170 -162 -155 -153 -153 -148
200901 LHZ AR 744 -176 -177 -178 -179 -179 -179 -179 -180 -180 -180 -180 -179 -177 -176 -172 -168 -161 -155 -152 -151 -148
200812 LHZ AR 744 -174 -176 -176 -177 -178 -178 -178 -179 -179 -179 -179 -178 -177 -176 -173 -169 -161 -155 -152 -152 -150
200811 LHZ AR 720 -174 -175 -176 -176 -177 -177 -178 -178 -178 -179 -179 -178 -178 -176 -174 -171 -165 -157 -154 -152 -150
200810 LHZ AR 743 -176 -177 -178 -178 -179 -179 -179 -180 -180 -180 -180 -179 -178 -177 -174 -170 -162 -156 -154 -152 -150
200809 LHZ AR 695 -176 -177 -178 -179 -180 -180 -180 -181 -181 -181 -181 -180 -179 -178 -176 -171 -164 -158 -157 -156 -153
200808 LHZ AR 719 -173 -175 -177 -178 -179 -179 -180 -180 -180 -180 -180 -179 -178 -177 -175 -172 -165 -160 -159 -161 -157
200807 LHZ AR 744 -174 -176 -177 -178 -179 -179 -180 -180 -181 -181 -180 -180 -179 -178 -176 -172 -165 -158 -158 -159 -155
200806 LHZ AR 695 -175 -177 -178 -179 -180 -180 -180 -181 -181 -181 -181 -180 -180 -178 -176 -170 -163 -157 -159 -161 -156
200805 LHZ AR 718 -177 -178 -179 -179 -180 -180 -181 -181 -182 -182 -182 -181 -180 -178 -176 -172 -165 -159 -158 -159 -156
200804 LHZ AR 710 -177 -179 -180 -180 -180 -180 -181 -181 -181 -181 -181 -181 -179 -177 -175 -171 -164 -158 -156 -155 -153
200803 LHZ AR 721 -178 -179 -180 -181 -180 -181 -181 -181 -181 -181 -181 -180 -179 -177 -174 -170 -163 -156 -155 -154 -149
200802 LHZ AR 696 -177 -178 -179 -179 -179 -179 -179 -180 -181 -181 -180 -180 -178 -176 -173 -168 -160 -154 -151 -150 -145
200801 LHZ AR 738 -177 -178 -179 -179 -179 -180 -180 -180 -180 -180 -180 -179 -178 -176 -174 -169 -161 -154 -151 -150 -146
200712 LHZ AR 728 -176 -177 -178 -179 -179 -179 -179 -180 -180 -180 -179 -179 -177 -176 -173 -168 -161 -153 -150 -150 -145
200711 LHZ AR 336 -175 -177 -178 -178 -179 -179 -179 -179 -180 -180 -179 -178 -177 -175 -172 -169 -163 -155 -150 -149 -149