LAO-US , 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
201105 LHZ AR 24 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201104 LHZ AR 509 -180 -181 -181 -181 -181 -181 -181 -181 -181 -180 -180 -178 -177 -175 -172 -169 -162 -156 -156 -156 -153
201103 LHZ AR 743 -179 -181 -180 -180 -180 -180 -180 -180 -180 -180 -180 -178 -177 -175 -171 -168 -162 -155 -153 -152 -150
201102 LHZ AR 271 -176 -178 -179 -179 -180 -180 -180 -179 -180 -180 -179 -179 -177 -176 -172 -168 -162 -155 -152 -151 -149
201012 LHZ AR 589 -175 -177 -178 -179 -179 -179 -180 -180 -180 -181 -180 -180 -178 -176 -173 -171 -165 -158 -153 -150 -151
201011 LHZ AR 720 -178 -179 -180 -180 -180 -180 -180 -180 -180 -180 -179 -178 -176 -175 -172 -169 -163 -156 -151 -149 -149
201010 LHZ AR 737 -178 -180 -180 -181 -181 -181 -181 -181 -181 -181 -180 -179 -178 -177 -173 -171 -164 -157 -155 -152 -150
201009 LHZ AR 716 -177 -179 -180 -180 -180 -181 -181 -181 -181 -181 -180 -179 -178 -177 -173 -169 -162 -157 -156 -156 -154
201008 LHZ AR 721 -175 -177 -179 -180 -180 -180 -180 -180 -180 -181 -180 -179 -177 -176 -172 -170 -163 -158 -159 -161 -154
201007 LHZ AR 664 -176 -178 -179 -180 -180 -180 -180 -181 -181 -181 -180 -179 -178 -176 -173 -171 -164 -159 -159 -161 -156
201006 LHZ AR 262 -178 -179 -181 -180 -181 -180 -180 -181 -181 -181 -181 -180 -179 -177 -173 -171 -163 -159 -159 -160 -155
200812 LHZ AR 719 -180 -180 -180 -180 -180 -180 -180 -180 -180 -180 -179 -177 -176 -174 -171 -168 -161 -154 -152 -152 -150
200811 LHZ AR 663 -182 -182 -182 -181 -181 -181 -181 -181 -181 -180 -180 -179 -177 -175 -172 -170 -164 -157 -154 -151 -150
200810 LHZ AR 715 -182 -182 -182 -182 -181 -181 -181 -181 -182 -181 -181 -179 -177 -176 -172 -169 -162 -157 -154 -152 -150
200809 LHZ AR 681 -181 -181 -182 -182 -181 -181 -181 -181 -182 -182 -181 -180 -179 -177 -173 -170 -164 -158 -157 -155 -152
200808 LHZ AR 429 -180 -181 -181 -181 -181 -181 -181 -182 -182 -181 -180 -179 -178 -176 -171 -170 -163 -159 -158 -158 -155