HCNY-LD , 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. 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN 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 LHN AR 689 -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 LHN 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 LHN 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 LHN 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 LHN AR 669 -158 -160 -162 -165 -166 -169 -171 -173 -174 -175 -176 -175 -175 -175 -174 -174 -173 -173 -173 -172 -171 -170 -170 -169 -167
201901 LHN AR 744 -160 -162 -164 -167 -168 -170 -173 -174 -176 -176 -177 -177 -177 -177 -176 -175 -174 -173 -173 -172 -172 -171 -170 -170 -169
201812 LHN AR 725 -161 -163 -164 -166 -167 -168 -170 -172 -173 -171 -174 -175 -176 -175 -176 -176 -175 -174 -173 -170 -169 -168 -168 -167 -166
201811 LHN AR 711 -162 -164 -165 -166 -168 -169 -171 -172 -174 -174 -174 -175 -176 -177 -177 -177 -176 -174 -172 -168 -163 -156 -153 -153 -152
201810 LHN AR 704 -157 -158 -160 -161 -163 -165 -167 -168 -170 -171 -172 -173 -174 -175 -176 -176 -176 -175 -174 -171 -165 -159 -155 -153 -150
201809 LHN AR 671 -158 -160 -162 -164 -166 -167 -168 -169 -172 -173 -173 -174 -175 -176 -177 -176 -176 -176 -174 -171 -165 -160 -159 -156 -154
201808 LHN AR 704 -159 -162 -164 -166 -167 -168 -170 -172 -173 -174 -175 -175 -177 -178 -178 -179 -178 -178 -176 -174 -168 -163 -162 -161 -159
201807 LHN AR 660 -163 -165 -167 -169 -170 -172 -173 -174 -175 -176 -176 -178 -178 -179 -180 -180 -180 -179 -177 -173 -167 -163 -163 -162 -157
201806 LHN AR 709 -164 -166 -168 -169 -170 -171 -173 -174 -175 -176 -176 -178 -179 -180 -180 -181 -180 -179 -176 -174 -168 -162 -161 -161 -157
201805 LHN AR 736 -163 -164 -167 -168 -170 -171 -172 -173 -175 -175 -176 -177 -178 -180 -180 -180 -179 -179 -176 -174 -168 -163 -162 -160 -157
201804 LHN AR 714 -163 -165 -167 -168 -169 -171 -173 -173 -175 -175 -176 -177 -178 -179 -179 -179 -179 -178 -176 -173 -167 -161 -158 -158 -155
201803 LHN AR 743 -166 -168 -168 -170 -171 -173 -174 -175 -176 -176 -176 -177 -178 -179 -179 -179 -178 -178 -175 -172 -167 -160 -156 -153 -152
201802 LHN AR 64 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999