JOHN-IU , LH2-00


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
202408 LH2-00 AR 22 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
202404 LH2-00 AR 219 -139 -138 -139 -139 -141 -142 -142 -143 -143 -144 -145 -147 -147 -148 -149 -149 -149 -151 -150 -152 -149 -146 -142 -138 -134
202403 LH2-00 AR 646 -136 -135 -135 -137 -138 -138 -139 -140 -141 -141 -142 -143 -144 -144 -145 -145 -145 -145 -144 -143 -142 -140 -140 -138 -133
202302 LH2-00 AR 164 -139 -137 -139 -139 -141 -141 -143 -144 -144 -145 -145 -146 -146 -146 -146 -146 -146 -145 -146 -144 -143 -142 -141 -136 -130
202301 LH2-00 AR 266 -135 -135 -136 -137 -139 -139 -140 -141 -142 -143 -144 -146 -147 -147 -149 -150 -151 -150 -150 -149 -146 -140 -138 -137 -130
202211 LH2-00 AR 151 -138 -138 -139 -139 -142 -143 -143 -144 -146 -146 -147 -148 -149 -149 -150 -150 -151 -150 -150 -149 -147 -146 -144 -142 -136
202210 LH2-00 AR 743 -138 -138 -139 -140 -141 -142 -143 -144 -145 -145 -147 -148 -148 -149 -150 -150 -150 -150 -151 -151 -149 -146 -144 -142 -138
202209 LH2-00 AR 718 -141 -140 -142 -143 -145 -145 -146 -147 -147 -147 -149 -149 -149 -149 -150 -150 -150 -150 -150 -150 -148 -146 -144 -142 -140
202208 LH2-00 AR 718 -141 -139 -141 -143 -145 -145 -146 -147 -148 -148 -149 -150 -150 -150 -150 -150 -150 -150 -150 -150 -149 -148 -147 -144 -140
202207 LH2-00 AR 744 -141 -140 -141 -143 -145 -146 -146 -147 -147 -148 -148 -148 -149 -149 -148 -148 -148 -148 -148 -147 -146 -145 -145 -142 -137
202206 LH2-00 AR 720 -141 -140 -142 -144 -146 -146 -147 -148 -149 -149 -150 -150 -150 -150 -150 -150 -150 -149 -149 -148 -148 -146 -145 -144 -140
202205 LH2-00 AR 744 -141 -140 -141 -143 -145 -145 -147 -147 -148 -149 -150 -151 -151 -151 -151 -151 -151 -151 -151 -150 -149 -146 -145 -144 -137
202204 LH2-00 AR 720 -140 -139 -141 -142 -143 -144 -145 -146 -147 -147 -149 -150 -150 -149 -150 -150 -149 -149 -149 -149 -148 -146 -143 -141 -136
202203 LH2-00 AR 742 -139 -138 -140 -141 -142 -142 -144 -145 -146 -146 -147 -149 -149 -149 -150 -150 -150 -150 -149 -149 -147 -145 -142 -140 -136
202202 LH2-00 AR 672 -137 -137 -138 -139 -141 -141 -143 -144 -145 -145 -147 -149 -150 -150 -151 -151 -151 -151 -151 -150 -148 -142 -139 -136 -134
202201 LH2-00 AR 742 -134 -133 -135 -135 -138 -139 -140 -142 -143 -144 -146 -149 -149 -150 -152 -154 -156 -157 -157 -154 -149 -142 -137 -136 -135
202112 LH2-00 AR 744 -138 -137 -138 -139 -141 -141 -143 -144 -145 -146 -148 -149 -150 -151 -152 -154 -154 -155 -154 -153 -148 -144 -143 -140 -136
202111 LH2-00 AR 720 -140 -140 -141 -141 -143 -144 -145 -147 -147 -147 -149 -151 -150 -150 -152 -152 -152 -152 -151 -150 -148 -146 -145 -142 -138
202110 LH2-00 AR 744 -140 -139 -140 -142 -143 -144 -145 -146 -147 -147 -149 -150 -150 -150 -151 -151 -151 -150 -150 -149 -147 -145 -144 -142 -138
202109 LH2-00 AR 718 -142 -140 -141 -144 -145 -146 -147 -148 -149 -149 -151 -151 -151 -152 -152 -151 -151 -151 -150 -149 -148 -146 -144 -143 -139
202108 LH2-00 AR 728 -141 -140 -141 -143 -146 -146 -147 -149 -149 -150 -151 -152 -152 -152 -152 -152 -152 -151 -150 -150 -148 -146 -145 -143 -139
202107 LH2-00 AR 697 -141 -139 -141 -143 -146 -145 -147 -148 -149 -149 -151 -152 -152 -152 -153 -152 -152 -152 -151 -150 -149 -147 -145 -143 -138
202106 LH2-00 AR 717 -141 -140 -141 -144 -146 -147 -149 -149 -150 -151 -152 -153 -154 -153 -154 -153 -153 -152 -152 -151 -150 -147 -145 -143 -139
202105 LH2-00 AR 643 -137 -136 -138 -140 -141 -141 -142 -144 -145 -146 -147 -149 -149 -150 -151 -151 -151 -151 -151 -150 -148 -146 -144 -144 -138
202104 LH2-00 AR 720 -137 -137 -138 -139 -140 -141 -142 -143 -144 -144 -145 -147 -148 -148 -148 -149 -149 -149 -149 -148 -146 -145 -144 -142 -136
202103 LH2-00 AR 744 -135 -135 -136 -138 -139 -140 -141 -143 -143 -144 -145 -146 -147 -147 -148 -148 -148 -148 -148 -148 -147 -145 -142 -140 -134
202102 LH2-00 AR 649 -135 -135 -135 -137 -138 -140 -141 -142 -143 -144 -145 -147 -147 -147 -149 -150 -150 -151 -151 -149 -146 -142 -140 -139 -136
202101 LH2-00 AR 744 -133 -132 -134 -135 -136 -138 -139 -140 -141 -142 -143 -145 -145 -146 -147 -149 -149 -150 -149 -149 -146 -142 -141 -138 -129
202012 LH2-00 AR 689 -134 -134 -135 -136 -138 -138 -140 -141 -142 -142 -144 -145 -146 -146 -148 -148 -149 -149 -149 -148 -146 -144 -142 -139 -133
202011 LH2-00 AR 697 -137 -136 -137 -139 -140 -141 -142 -143 -143 -144 -145 -147 -148 -148 -149 -150 -150 -151 -151 -151 -150 -146 -143 -141 -137
202010 LH2-00 AR 739 -137 -137 -139 -139 -141 -142 -143 -145 -145 -146 -148 -149 -149 -150 -151 -152 -152 -152 -152 -152 -151 -148 -146 -143 -139
202009 LH2-00 AR 718 -138 -137 -139 -141 -142 -143 -144 -146 -147 -147 -149 -150 -150 -150 -150 -151 -151 -150 -150 -150 -149 -147 -145 -144 -139
202008 LH2-00 AR 744 -140 -139 -140 -142 -145 -146 -147 -148 -148 -149 -150 -151 -151 -152 -152 -152 -151 -151 -150 -150 -149 -148 -146 -144 -141
202007 LH2-00 AR 740 -140 -138 -141 -143 -145 -146 -148 -149 -149 -150 -151 -152 -152 -152 -153 -153 -152 -152 -151 -151 -150 -148 -146 -144 -140
202006 LH2-00 AR 719 -140 -139 -141 -142 -144 -145 -146 -147 -148 -149 -150 -151 -152 -151 -152 -152 -151 -151 -151 -150 -148 -146 -144 -143 -138
202005 LH2-00 AR 741 -139 -139 -140 -142 -144 -144 -146 -147 -148 -148 -150 -151 -151 -152 -152 -153 -152 -152 -151 -151 -149 -147 -145 -142 -138
202004 LH2-00 AR 714 -138 -137 -138 -140 -142 -142 -144 -146 -147 -148 -149 -151 -152 -152 -154 -154 -154 -154 -155 -154 -153 -148 -144 -141 -138
202003 LH2-00 AR 742 -136 -136 -137 -138 -140 -141 -143 -144 -146 -147 -148 -149 -150 -150 -151 -151 -152 -151 -151 -150 -148 -145 -143 -140 -136
202002 LH2-00 AR 695 -135 -135 -136 -137 -140 -141 -142 -144 -144 -145 -146 -148 -149 -149 -150 -151 -150 -150 -150 -149 -147 -144 -142 -138 -135
202001 LH2-00 AR 737 -134 -134 -135 -137 -139 -141 -142 -144 -145 -146 -148 -149 -150 -150 -152 -152 -152 -152 -151 -150 -147 -144 -141 -138 -133
201912 LH2-00 AR 675 -134 -134 -136 -137 -140 -141 -142 -144 -145 -146 -148 -150 -150 -151 -152 -152 -153 -153 -153 -152 -150 -147 -144 -141 -135
201911 LH2-00 AR 720 -135 -136 -137 -139 -140 -141 -143 -145 -146 -147 -148 -151 -151 -151 -153 -153 -153 -153 -153 -152 -150 -148 -145 -142 -139
201910 LH2-00 AR 738 -137 -137 -138 -140 -142 -143 -144 -146 -147 -147 -150 -151 -152 -152 -153 -153 -153 -153 -153 -152 -151 -147 -145 -142 -140
201909 LH2-00 AR 720 -138 -138 -139 -140 -142 -144 -146 -147 -148 -149 -151 -153 -154 -154 -155 -155 -155 -155 -155 -154 -151 -147 -144 -142 -138
201908 LH2-00 AR 744 -137 -136 -137 -138 -140 -141 -141 -142 -143 -143 -143 -144 -144 -145 -145 -145 -145 -145 -145 -146 -145 -144 -143 -142 -139
201907 LH2-00 AR 743 -136 -136 -137 -138 -140 -141 -142 -143 -144 -145 -146 -147 -147 -147 -148 -148 -148 -148 -148 -148 -147 -145 -143 -142 -139
201906 LH2-00 AR 696 -139 -138 -140 -142 -144 -145 -146 -147 -147 -148 -149 -149 -150 -150 -151 -151 -151 -152 -152 -152 -150 -149 -148 -145 -140
201905 LH2-00 AR 744 -138 -137 -139 -141 -143 -143 -145 -146 -146 -147 -148 -149 -149 -149 -150 -150 -150 -150 -150 -150 -149 -146 -144 -142 -138
201904 LH2-00 AR 720 -137 -136 -137 -139 -140 -141 -142 -143 -144 -144 -145 -146 -146 -146 -147 -147 -147 -147 -147 -146 -145 -143 -142 -140 -137
201903 LH2-00 AR 744 -135 -136 -137 -137 -139 -140 -141 -142 -143 -143 -144 -146 -146 -146 -147 -147 -148 -147 -147 -145 -144 -142 -141 -139 -135
201902 LH2-00 AR 671 -135 -135 -136 -137 -139 -140 -142 -143 -144 -144 -146 -147 -147 -147 -148 -148 -148 -148 -148 -147 -146 -145 -142 -138 -135
201901 LH2-00 AR 744 -135 -134 -136 -137 -138 -139 -140 -141 -142 -142 -143 -145 -145 -145 -146 -147 -147 -147 -147 -146 -143 -140 -139 -137 -133
201812 LH2-00 AR 744 -134 -134 -135 -135 -137 -138 -139 -140 -141 -141 -142 -143 -144 -144 -145 -145 -145 -144 -144 -143 -142 -141 -140 -138 -132
201811 LH2-00 AR 719 -136 -136 -137 -138 -139 -140 -141 -142 -142 -143 -143 -144 -144 -144 -144 -144 -144 -144 -144 -144 -143 -142 -141 -139 -137
201810 LH2-00 AR 719 -135 -135 -136 -137 -139 -140 -141 -142 -142 -143 -144 -145 -145 -147 -148 -149 -150 -150 -150 -149 -147 -143 -141 -140 -135
201809 LH2-00 AR 720 -138 -138 -140 -141 -143 -144 -145 -146 -147 -147 -148 -150 -150 -150 -151 -151 -151 -151 -152 -151 -150 -148 -146 -143 -138
201808 LH2-00 AR 741 -139 -138 -139 -142 -143 -145 -146 -147 -148 -148 -150 -151 -151 -151 -152 -152 -152 -151 -151 -151 -149 -146 -145 -143 -140
201807 LH2-00 AR 742 -139 -138 -139 -141 -142 -143 -144 -145 -146 -146 -147 -147 -148 -148 -148 -148 -148 -148 -147 -147 -146 -145 -144 -142 -138
201806 LH2-00 AR 720 -138 -138 -139 -141 -142 -143 -144 -145 -146 -147 -148 -148 -149 -149 -149 -149 -150 -150 -149 -149 -148 -146 -145 -143 -138
201805 LH2-00 AR 744 -138 -137 -138 -140 -141 -142 -143 -145 -146 -146 -147 -148 -148 -149 -149 -149 -149 -149 -149 -148 -148 -145 -145 -143 -138
201804 LH2-00 AR 720 -137 -136 -138 -139 -141 -141 -143 -144 -145 -146 -148 -149 -150 -149 -151 -152 -152 -152 -152 -152 -151 -147 -145 -141 -137
201803 LH2-00 AR 744 -137 -138 -138 -139 -142 -143 -144 -145 -146 -147 -148 -150 -151 -151 -152 -153 -154 -154 -154 -154 -152 -149 -145 -141 -138
201802 LH2-00 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