AMTX-US , 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
201105 LHN AR 43 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201104 LHN AR 720 -135 -136 -137 -138 -139 -141 -142 -143 -145 -146 -147 -148 -150 -151 -152 -153 -152 -151 -150 -150 -147
201103 LHN AR 744 -135 -136 -138 -139 -140 -142 -143 -144 -146 -147 -148 -149 -150 -151 -152 -152 -152 -150 -150 -150 -146
201102 LHN AR 672 -134 -136 -138 -139 -141 -142 -143 -145 -146 -147 -148 -149 -150 -151 -152 -153 -152 -149 -149 -149 -146
201101 LHN AR 744 -134 -136 -138 -138 -140 -142 -143 -144 -146 -147 -149 -150 -151 -152 -154 -155 -152 -150 -148 -149 -145
201012 LHN AR 744 -133 -135 -136 -138 -139 -141 -142 -144 -145 -146 -147 -149 -150 -152 -154 -154 -154 -152 -149 -148 -148
201011 LHN AR 720 -134 -135 -136 -137 -138 -139 -141 -142 -143 -144 -146 -147 -148 -150 -152 -153 -153 -150 -148 -146 -146
201010 LHN AR 742 -138 -139 -140 -141 -142 -143 -145 -146 -148 -148 -150 -151 -152 -154 -155 -157 -156 -152 -150 -150 -148
201009 LHN AR 720 -138 -139 -140 -142 -143 -144 -146 -147 -149 -149 -151 -151 -153 -154 -154 -154 -154 -152 -151 -151 -148
201008 LHN AR 438 -140 -141 -142 -144 -146 -147 -148 -149 -151 -153 -154 -154 -155 -156 -157 -158 -157 -155 -156 -156 -149
201007 LHN AR 343 -138 -138 -140 -141 -141 -143 -143 -145 -146 -147 -149 -151 -152 -153 -153 -154 -154 -153 -153 -154 -151
201006 LHN AR 720 -138 -139 -140 -141 -142 -143 -144 -145 -146 -147 -148 -149 -150 -151 -151 -152 -152 -152 -153 -153 -150
201005 LHN AR 744 -137 -139 -140 -142 -143 -144 -145 -146 -148 -149 -150 -150 -151 -152 -153 -153 -153 -152 -152 -152 -150
201004 LHN AR 695 -137 -138 -139 -140 -141 -142 -143 -144 -145 -146 -147 -148 -149 -151 -151 -152 -152 -149 -149 -149 -145
201003 LHN AR 736 -137 -139 -140 -141 -142 -143 -144 -146 -148 -148 -150 -151 -152 -153 -155 -155 -154 -151 -149 -148 -143
201002 LHN AR 671 -137 -138 -139 -140 -142 -144 -144 -146 -147 -149 -150 -151 -153 -154 -156 -156 -155 -152 -150 -149 -147
201001 LHN AR 688 -139 -140 -141 -142 -144 -145 -146 -147 -148 -150 -151 -152 -153 -155 -156 -156 -155 -150 -147 -147 -144
200912 LHN AR 740 -136 -138 -140 -140 -142 -143 -145 -146 -147 -148 -149 -151 -152 -154 -155 -156 -154 -150 -148 -146 -144
200911 LHN AR 712 -140 -142 -143 -144 -145 -146 -147 -148 -149 -151 -152 -153 -153 -155 -156 -156 -155 -153 -150 -149 -147
200910 LHN AR 269 -135 -137 -139 -140 -142 -143 -144 -145 -146 -148 -149 -150 -151 -152 -154 -155 -154 -152 -149 -149 -147
200905 LHN AR 93 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
200904 LHN AR 687 -138 -139 -140 -141 -142 -144 -144 -145 -147 -148 -148 -150 -151 -152 -153 -153 -154 -153 -152 -152 -148
200903 LHN AR 702 -140 -141 -143 -144 -144 -146 -147 -148 -149 -150 -151 -152 -154 -155 -157 -158 -157 -154 -152 -152 -149
200902 LHN AR 667 -139 -141 -142 -144 -144 -146 -147 -148 -148 -150 -151 -152 -153 -154 -155 -156 -155 -153 -152 -152 -146
200901 LHN AR 687 -139 -141 -141 -142 -143 -144 -146 -147 -148 -149 -151 -151 -153 -154 -155 -156 -155 -153 -151 -151 -148
200812 LHN AR 711 -137 -138 -139 -140 -141 -142 -144 -145 -146 -147 -149 -151 -151 -152 -154 -154 -155 -153 -151 -151 -148
200811 LHN AR 655 -138 -139 -140 -142 -143 -144 -145 -146 -148 -149 -150 -151 -153 -154 -155 -156 -156 -154 -152 -150 -148
200810 LHN AR 627 -138 -139 -141 -142 -143 -144 -145 -146 -147 -149 -150 -151 -153 -154 -155 -156 -155 -154 -152 -151 -149
200809 LHN AR 683 -142 -143 -145 -146 -147 -148 -149 -150 -151 -152 -153 -155 -156 -157 -158 -159 -158 -155 -153 -153 -150
200808 LHN AR 420 -142 -143 -144 -146 -146 -148 -149 -150 -151 -153 -155 -156 -158 -159 -160 -160 -160 -158 -157 -156 -153