HCNY-LD , 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. 518s 439s 373s 316s 268s 228s 193s 164s 139s 118s 100s 85s 72s 61s 52s 44s 37s 32s 27s 23s 19s 16s 14s 12s 10s
202005 LHZ AR 204 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
202004 LHZ AR 719 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
202003 LHZ AR 744 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
202002 LHZ AR 686 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
202001 LHZ AR 743 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201912 LHZ AR 744 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201911 LHZ AR 719 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201910 LHZ AR 720 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201909 LHZ AR 655 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201908 LHZ AR 736 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201907 LHZ AR 742 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201906 LHZ AR 713 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201905 LHZ AR 740 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201904 LHZ AR 720 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201903 LHZ AR 742 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201902 LHZ AR 669 -158 -160 -161 -165 -167 -169 -170 -172 -173 -175 -176 -174 -174 -174 -173 -172 -171 -171 -171 -169 -168 -168 -166 -166 -165
201901 LHZ AR 744 -163 -165 -167 -169 -171 -173 -175 -177 -178 -179 -179 -179 -178 -178 -177 -176 -175 -174 -174 -172 -171 -171 -170 -169 -168
201812 LHZ AR 725 -167 -169 -170 -172 -173 -175 -176 -177 -178 -178 -178 -178 -179 -179 -179 -178 -178 -176 -174 -172 -171 -171 -170 -170 -169
201811 LHZ AR 710 -176 -177 -178 -180 -181 -181 -182 -182 -181 -181 -180 -180 -181 -181 -181 -180 -179 -177 -174 -169 -161 -154 -152 -152 -151
201810 LHZ AR 728 -177 -178 -180 -181 -182 -182 -182 -182 -182 -182 -181 -181 -182 -182 -181 -181 -180 -179 -176 -171 -163 -157 -154 -152 -150
201809 LHZ AR 675 -177 -178 -180 -181 -181 -182 -182 -182 -182 -181 -181 -181 -182 -182 -182 -181 -181 -179 -176 -171 -164 -159 -157 -156 -154
201808 LHZ AR 710 -177 -178 -179 -180 -181 -181 -181 -182 -182 -181 -181 -181 -182 -182 -182 -182 -181 -180 -177 -174 -166 -161 -161 -161 -158
201807 LHZ AR 667 -176 -177 -179 -180 -180 -181 -181 -181 -181 -181 -180 -181 -181 -182 -182 -182 -181 -180 -177 -172 -165 -160 -162 -162 -157
201806 LHZ AR 709 -177 -179 -180 -181 -181 -182 -182 -182 -182 -182 -182 -182 -182 -182 -182 -182 -181 -180 -177 -173 -165 -160 -161 -161 -157
201805 LHZ AR 736 -177 -178 -180 -181 -181 -182 -182 -182 -182 -181 -181 -181 -182 -182 -182 -182 -181 -180 -176 -172 -165 -160 -161 -159 -156
201804 LHZ AR 714 -177 -178 -180 -181 -181 -182 -182 -182 -182 -181 -181 -181 -181 -182 -182 -181 -181 -179 -177 -173 -167 -160 -158 -157 -154
201803 LHZ AR 743 -176 -178 -179 -180 -180 -181 -181 -181 -181 -181 -180 -181 -181 -181 -181 -180 -179 -178 -175 -171 -164 -159 -155 -153 -153
201802 LHZ AR 644 -175 -177 -179 -180 -180 -181 -182 -181 -181 -181 -181 -181 -181 -181 -181 -180 -179 -178 -175 -170 -163 -156 -153 -154 -152
201801 LHZ AR 724 -176 -178 -179 -180 -181 -181 -182 -181 -181 -181 -180 -180 -180 -180 -180 -180 -179 -177 -174 -169 -162 -155 -151 -151 -148