ASCN-II , LH1-00


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
202403 LH1-00 AR 626 -122 -124 -126 -128 -129 -130 -131 -132 -133 -135 -135 -137 -137 -139 -140 -141 -143 -144 -146 -147 -147 -146 -144 -142 -141
202402 LH1-00 AR 696 -119 -121 -123 -124 -126 -127 -128 -129 -130 -132 -133 -134 -135 -136 -136 -138 -139 -141 -143 -144 -145 -144 -144 -142 -140
202401 LH1-00 AR 744 -119 -121 -123 -124 -126 -126 -127 -129 -130 -131 -132 -133 -134 -135 -136 -137 -138 -140 -141 -143 -144 -144 -143 -142 -141
202312 LH1-00 AR 744 -119 -120 -121 -123 -123 -124 -125 -126 -128 -129 -130 -131 -133 -134 -135 -136 -137 -139 -140 -141 -143 -143 -144 -142 -142
202311 LH1-00 AR 673 -119 -119 -121 -122 -123 -124 -124 -126 -127 -128 -130 -131 -132 -134 -136 -138 -139 -140 -142 -144 -145 -145 -143 -142 -141
202310 LH1-00 AR 728 -117 -119 -120 -120 -122 -122 -123 -124 -125 -127 -128 -129 -130 -131 -132 -134 -135 -136 -138 -139 -140 -141 -141 -141 -141
202309 LH1-00 AR 713 -117 -118 -119 -119 -121 -121 -122 -123 -124 -126 -127 -128 -130 -131 -132 -133 -135 -136 -137 -139 -140 -141 -140 -138 -135
202308 LH1-00 AR 351 -118 -120 -121 -121 -122 -123 -124 -125 -127 -128 -129 -130 -132 -133 -135 -136 -138 -139 -141 -141 -142 -143 -140 -137 -137
202307 LH1-00 AR 744 -119 -120 -120 -121 -122 -122 -123 -124 -125 -125 -126 -127 -128 -129 -130 -132 -133 -134 -135 -137 -138 -139 -139 -138 -138
202306 LH1-00 AR 700 -121 -123 -124 -125 -126 -127 -127 -129 -129 -130 -131 -132 -133 -134 -135 -137 -138 -139 -140 -141 -141 -142 -139 -139 -139
202305 LH1-00 AR 426 -122 -124 -125 -127 -128 -129 -129 -131 -131 -132 -133 -134 -134 -135 -136 -137 -138 -140 -141 -142 -142 -142 -141 -140 -138
202304 LH1-00 AR 720 -123 -124 -125 -126 -127 -128 -129 -130 -131 -131 -132 -133 -134 -135 -137 -137 -139 -140 -141 -142 -143 -142 -141 -140 -139
202303 LH1-00 AR 705 -122 -124 -125 -127 -128 -129 -130 -132 -133 -134 -135 -136 -137 -138 -139 -140 -141 -142 -143 -145 -145 -144 -142 -141 -139
202302 LH1-00 AR 672 -118 -119 -120 -121 -122 -123 -124 -125 -126 -127 -127 -128 -129 -130 -131 -132 -133 -135 -136 -137 -138 -139 -139 -140 -140
202301 LH1-00 AR 685 -118 -119 -120 -122 -122 -123 -124 -125 -126 -127 -128 -129 -130 -131 -131 -133 -134 -135 -136 -138 -139 -140 -141 -141 -139
202212 LH1-00 AR 741 -118 -119 -120 -120 -121 -122 -123 -124 -125 -126 -127 -128 -129 -131 -132 -133 -134 -135 -136 -139 -140 -141 -141 -141 -140
202211 LH1-00 AR 720 -118 -118 -120 -120 -121 -121 -123 -123 -125 -126 -127 -127 -129 -130 -131 -132 -134 -135 -136 -137 -139 -139 -140 -141 -140
202210 LH1-00 AR 743 -118 -119 -119 -120 -121 -121 -123 -123 -124 -126 -127 -128 -129 -131 -133 -134 -135 -136 -138 -139 -140 -141 -141 -142 -140
202209 LH1-00 AR 619 -117 -118 -119 -119 -121 -121 -122 -123 -124 -125 -127 -128 -129 -130 -132 -133 -134 -136 -137 -138 -140 -140 -140 -139 -139
202208 LH1-00 AR 717 -118 -119 -120 -122 -122 -123 -124 -125 -126 -127 -128 -129 -130 -131 -132 -134 -135 -136 -137 -138 -139 -140 -139 -139 -137
202207 LH1-00 AR 683 -119 -120 -122 -122 -123 -124 -125 -126 -127 -127 -128 -129 -129 -130 -131 -132 -133 -134 -135 -136 -138 -138 -138 -139 -138
202206 LH1-00 AR 716 -118 -119 -120 -122 -123 -125 -126 -127 -129 -131 -133 -135 -136 -138 -140 -141 -143 -145 -146 -147 -149 -148 -147 -145 -145
202205 LH1-00 AR 743 -115 -116 -118 -119 -122 -123 -125 -126 -128 -130 -132 -134 -135 -137 -138 -140 -141 -142 -143 -145 -146 -146 -145 -145 -144
202204 LH1-00 AR 718 -115 -117 -118 -121 -122 -124 -126 -128 -130 -132 -133 -135 -137 -138 -140 -141 -142 -144 -145 -147 -147 -147 -146 -145 -142
202203 LH1-00 AR 744 -115 -115 -117 -118 -120 -122 -123 -125 -127 -129 -130 -132 -133 -135 -136 -137 -139 -140 -142 -143 -144 -145 -145 -145 -142
202202 LH1-00 AR 670 -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
202201 LH1-00 AR 739 -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
202112 LH1-00 AR 726 -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
202111 LH1-00 AR 513 -102 -102 -103 -104 -104 -105 -107 -108 -111 -113 -115 -116 -118 -120 -121 -124 -125 -126 -128 -129 -131 -133 -135 -136 -137
202110 LH1-00 AR 190 -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
202109 LH1-00 AR 275 -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
202108 LH1-00 AR 695 -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
202107 LH1-00 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
202106 LH1-00 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
202105 LH1-00 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
202104 LH1-00 AR 718 -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
202103 LH1-00 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
202102 LH1-00 AR 667 -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
202101 LH1-00 AR 674 -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
202012 LH1-00 AR 581 -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
202011 LH1-00 AR 717 -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
202010 LH1-00 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
202009 LH1-00 AR 715 -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
202008 LH1-00 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
202007 LH1-00 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
202006 LH1-00 AR 714 -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
202005 LH1-00 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
202004 LH1-00 AR 718 -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 LH1-00 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 LH1-00 AR 693 -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 LH1-00 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
201912 LH1-00 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 LH1-00 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
201910 LH1-00 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
201909 LH1-00 AR 718 -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 LH1-00 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
201907 LH1-00 AR 733 -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 LH1-00 AR 696 -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 LH1-00 AR 741 -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 LH1-00 AR 710 -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 LH1-00 AR 741 -149 -150 -150 -153 -154 -155 -156 -157 -157 -158 -159 -160 -160 -161 -161 -162 -162 -161 -163 -163 -159 -152 -148 -145 -142
201902 LH1-00 AR 669 -150 -151 -151 -154 -155 -156 -157 -157 -158 -159 -160 -160 -161 -161 -162 -162 -162 -162 -163 -163 -158 -151 -147 -146 -143
201901 LH1-00 AR 743 -150 -151 -151 -153 -154 -155 -156 -157 -158 -159 -159 -160 -160 -161 -161 -162 -162 -161 -162 -162 -159 -152 -147 -145 -143
201812 LH1-00 AR 741 -150 -151 -151 -153 -154 -155 -156 -157 -158 -158 -159 -160 -160 -161 -162 -162 -162 -162 -163 -163 -159 -151 -146 -144 -143
201811 LH1-00 AR 708 -150 -151 -151 -153 -154 -155 -156 -157 -158 -159 -159 -160 -161 -161 -162 -162 -162 -162 -162 -163 -158 -152 -146 -143 -141
201810 LH1-00 AR 719 -151 -152 -152 -154 -155 -156 -157 -157 -158 -159 -160 -161 -161 -161 -162 -162 -162 -162 -163 -164 -160 -152 -147 -144 -142
201809 LH1-00 AR 716 -150 -150 -151 -153 -154 -155 -156 -157 -158 -159 -159 -160 -161 -161 -162 -162 -162 -161 -162 -163 -159 -152 -148 -143 -140
201808 LH1-00 AR 740 -148 -149 -149 -151 -153 -154 -155 -156 -156 -158 -158 -159 -160 -160 -161 -161 -161 -161 -162 -162 -159 -152 -147 -142 -138
201807 LH1-00 AR 738 -149 -150 -149 -153 -154 -155 -156 -157 -158 -159 -159 -160 -160 -161 -161 -162 -162 -162 -163 -163 -160 -153 -148 -141 -141
201806 LH1-00 AR 713 -148 -149 -149 -152 -153 -154 -155 -156 -157 -158 -159 -159 -160 -160 -161 -161 -161 -161 -162 -163 -159 -151 -146 -144 -142
201805 LH1-00 AR 741 -149 -149 -149 -152 -153 -154 -156 -156 -157 -158 -159 -160 -160 -161 -161 -161 -161 -161 -162 -162 -159 -153 -147 -144 -141
201804 LH1-00 AR 718 -150 -150 -151 -154 -154 -155 -157 -157 -158 -159 -159 -160 -161 -161 -162 -162 -162 -161 -162 -163 -159 -150 -144 -143 -140
201803 LH1-00 AR 737 -149 -150 -151 -154 -154 -155 -156 -157 -158 -159 -159 -160 -160 -161 -162 -162 -162 -162 -163 -163 -158 -151 -146 -143 -141
201802 LH1-00 AR 62 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999