936A-TA , 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
201111 LHN AR 426 -144 -145 -146 -148 -149 -149 -150 -151 -152 -153 -153 -154 -154 -154 -154 -153 -149 -144 -142 -141 -139
201110 LHN AR 744 -144 -145 -146 -147 -148 -149 -151 -151 -152 -153 -154 -155 -155 -156 -155 -154 -149 -145 -144 -143 -141
201109 LHN AR 710 -145 -146 -148 -149 -151 -152 -152 -155 -155 -157 -158 -158 -159 -159 -159 -156 -151 -146 -145 -144 -142
201108 LHN AR 741 -145 -147 -148 -149 -151 -151 -153 -153 -154 -154 -155 -154 -155 -155 -155 -154 -151 -147 -147 -148 -145
201107 LHN AR 744 -145 -146 -148 -149 -149 -150 -150 -151 -151 -152 -152 -152 -152 -152 -152 -152 -150 -148 -147 -148 -144
201106 LHN AR 718 -147 -147 -149 -149 -149 -150 -150 -151 -151 -152 -152 -152 -152 -151 -151 -150 -147 -144 -145 -146 -141
201105 LHN AR 744 -144 -146 -146 -146 -147 -147 -148 -148 -148 -148 -149 -149 -150 -149 -149 -148 -147 -145 -144 -144 -142
201104 LHN AR 720 -143 -143 -144 -144 -144 -144 -145 -146 -146 -146 -146 -147 -146 -146 -146 -145 -144 -143 -142 -142 -139
201103 LHN AR 744 -147 -148 -150 -150 -151 -151 -151 -151 -152 -152 -152 -152 -152 -151 -151 -150 -147 -144 -143 -142 -139
201102 LHN AR 668 -142 -143 -144 -145 -145 -145 -146 -147 -148 -149 -150 -151 -152 -152 -152 -151 -147 -143 -142 -142 -140
201101 LHN AR 742 -141 -142 -143 -144 -145 -146 -148 -149 -150 -151 -152 -153 -154 -155 -155 -152 -147 -143 -141 -141 -136
201012 LHN AR 744 -143 -143 -145 -146 -147 -149 -150 -152 -152 -153 -154 -155 -155 -155 -155 -154 -150 -146 -142 -140 -141
201011 LHN AR 720 -145 -146 -148 -149 -150 -151 -152 -153 -154 -154 -154 -154 -154 -154 -154 -153 -150 -145 -142 -140 -139
201010 LHN AR 699 -148 -150 -151 -153 -154 -155 -156 -156 -157 -157 -158 -158 -158 -158 -157 -155 -151 -145 -144 -143 -141
201009 LHN AR 705 -146 -148 -149 -150 -151 -151 -152 -153 -153 -153 -154 -154 -155 -154 -154 -153 -148 -145 -145 -145 -144
201008 LHN AR 744 -150 -151 -152 -153 -154 -155 -156 -156 -156 -156 -156 -156 -156 -156 -155 -154 -150 -146 -147 -149 -144
201007 LHN AR 744 -146 -147 -148 -149 -149 -150 -150 -150 -151 -151 -151 -152 -152 -152 -151 -151 -149 -146 -147 -148 -143
201006 LHN AR 720 -144 -146 -146 -147 -148 -148 -149 -149 -149 -150 -150 -150 -150 -150 -150 -150 -149 -146 -146 -146 -144
201005 LHN AR 744 -145 -146 -148 -149 -149 -150 -150 -151 -151 -152 -152 -151 -152 -151 -151 -150 -148 -145 -145 -145 -141
201004 LHN AR 695 -144 -146 -147 -148 -148 -149 -149 -151 -151 -152 -152 -152 -152 -152 -152 -152 -148 -144 -142 -142 -138
201003 LHN AR 598 -144 -147 -148 -149 -150 -151 -151 -153 -153 -154 -155 -155 -155 -154 -154 -151 -147 -142 -141 -141 -134
201002 LHN AR 669 -141 -143 -144 -145 -146 -147 -148 -149 -151 -152 -153 -154 -155 -156 -156 -153 -150 -145 -142 -140 -139
201001 LHN AR 363 -141 -143 -144 -145 -147 -147 -148 -149 -151 -151 -153 -153 -154 -154 -155 -152 -147 -142 -139 -139 -133