SDV-IU , LHZ-10


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
202504 LHZ-10 AR 671 -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
202503 LHZ-10 AR 471 -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
202502 LHZ-10 AR 656 -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
202501 LHZ-10 AR 724 -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
202412 LHZ-10 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
202411 LHZ-10 AR 701 -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
202410 LHZ-10 AR 619 -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
202409 LHZ-10 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
202408 LHZ-10 AR 618 -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
202407 LHZ-10 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
202406 LHZ-10 AR 684 -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
202405 LHZ-10 AR 716 -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
202404 LHZ-10 AR 687 -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
202403 LHZ-10 AR 707 -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
202402 LHZ-10 AR 660 -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
202401 LHZ-10 AR 691 -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
202312 LHZ-10 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
202311 LHZ-10 AR 671 -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
202310 LHZ-10 AR 529 -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
202309 LHZ-10 AR 620 -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
202308 LHZ-10 AR 541 -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
202307 LHZ-10 AR 685 -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
202306 LHZ-10 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
202305 LHZ-10 AR 561 -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
202304 LHZ-10 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
202303 LHZ-10 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
202302 LHZ-10 AR 671 -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
202301 LHZ-10 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
202212 LHZ-10 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
202211 LHZ-10 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
202210 LHZ-10 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
202209 LHZ-10 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
202208 LHZ-10 AR 578 -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
202207 LHZ-10 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
202206 LHZ-10 AR 711 -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
202205 LHZ-10 AR 728 -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
202204 LHZ-10 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
202203 LHZ-10 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
202202 LHZ-10 AR 219 -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 LHZ-10 AR 424 -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 LHZ-10 AR 708 -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 LHZ-10 AR 688 -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 LHZ-10 AR 712 -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 LHZ-10 AR 513 -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 LHZ-10 AR 617 -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 LHZ-10 AR 598 -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 LHZ-10 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
202011 LHZ-10 AR 500 -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 LHZ-10 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
202009 LHZ-10 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
202008 LHZ-10 AR 742 -166 -169 -170 -173 -174 -174 -175 -176 -176 -176 -175 -176 -176 -175 -175 -173 -170 -169 -165 -162 -158 -154 -155 -157 -154
202007 LHZ-10 AR 744 -172 -174 -177 -178 -179 -180 -181 -180 -181 -181 -182 -182 -183 -184 -183 -182 -181 -179 -177 -172 -165 -160 -160 -160 -157
202006 LHZ-10 AR 720 -174 -176 -178 -180 -182 -182 -182 -182 -181 -181 -181 -182 -183 -183 -183 -182 -180 -179 -177 -173 -165 -158 -158 -159 -153
202005 LHZ-10 AR 739 -173 -175 -178 -180 -182 -182 -182 -182 -182 -182 -182 -183 -183 -184 -183 -182 -181 -179 -177 -173 -166 -160 -160 -159 -155
202004 LHZ-10 AR 425 -174 -177 -179 -181 -183 -183 -183 -183 -183 -182 -183 -183 -184 -184 -184 -183 -181 -179 -177 -173 -165 -159 -158 -159 -156
202003 LHZ-10 AR 742 -172 -175 -178 -180 -182 -183 -183 -183 -182 -182 -182 -183 -184 -184 -183 -182 -180 -178 -176 -172 -164 -159 -158 -158 -153
202002 LHZ-10 AR 695 -173 -176 -178 -180 -181 -182 -182 -182 -182 -182 -182 -182 -183 -183 -182 -181 -179 -177 -175 -171 -163 -157 -157 -157 -153
202001 LHZ-10 AR 737 -172 -175 -177 -179 -180 -181 -181 -181 -181 -181 -181 -182 -182 -183 -182 -180 -179 -177 -174 -169 -162 -157 -157 -156 -152
201912 LHZ-10 AR 744 -170 -173 -175 -178 -180 -181 -181 -181 -181 -181 -182 -182 -183 -183 -183 -181 -180 -178 -176 -172 -165 -159 -159 -157 -156
201911 LHZ-10 AR 720 -174 -176 -178 -180 -182 -183 -182 -182 -182 -182 -182 -183 -183 -183 -183 -181 -180 -178 -176 -172 -164 -159 -158 -157 -155
201910 LHZ-10 AR 736 -173 -176 -177 -179 -181 -181 -181 -181 -181 -181 -181 -182 -183 -183 -183 -181 -180 -179 -177 -172 -165 -159 -157 -158 -157
201909 LHZ-10 AR 720 -171 -173 -174 -175 -175 -176 -175 -176 -176 -176 -176 -176 -176 -176 -176 -176 -175 -174 -173 -170 -165 -160 -159 -159 -157
201908 LHZ-10 AR 736 -171 -172 -173 -174 -174 -174 -174 -174 -174 -174 -174 -175 -174 -175 -174 -174 -173 -173 -172 -170 -165 -159 -159 -159 -156
201907 LHZ-10 AR 743 -171 -171 -173 -173 -174 -174 -175 -175 -175 -175 -175 -175 -176 -176 -175 -175 -174 -173 -172 -169 -163 -157 -158 -158 -153
201906 LHZ-10 AR 720 -174 -175 -177 -178 -180 -180 -180 -180 -179 -180 -180 -181 -181 -182 -181 -180 -179 -178 -176 -172 -165 -159 -159 -159 -156
201905 LHZ-10 AR 739 -174 -176 -178 -179 -180 -180 -181 -181 -181 -181 -181 -181 -182 -182 -182 -181 -180 -178 -176 -171 -163 -158 -158 -159 -154
201904 LHZ-10 AR 720 -172 -174 -176 -177 -179 -179 -180 -180 -181 -181 -181 -182 -183 -183 -182 -181 -180 -178 -176 -172 -164 -159 -157 -158 -156
201903 LHZ-10 AR 613 -174 -175 -177 -178 -180 -180 -181 -181 -181 -181 -182 -182 -183 -183 -183 -181 -180 -178 -176 -171 -163 -158 -158 -158 -154
201902 LHZ-10 AR 670 -172 -174 -175 -176 -177 -178 -179 -180 -180 -181 -181 -182 -182 -182 -182 -181 -179 -177 -175 -171 -163 -158 -158 -158 -153
201901 LHZ-10 AR 744 -173 -175 -176 -177 -178 -179 -180 -180 -181 -181 -181 -182 -183 -183 -182 -181 -179 -178 -175 -171 -164 -159 -158 -158 -154
201812 LHZ-10 AR 744 -172 -173 -174 -176 -176 -178 -179 -179 -179 -180 -181 -181 -182 -182 -182 -180 -179 -177 -175 -170 -163 -158 -157 -157 -152
201811 LHZ-10 AR 719 -173 -175 -177 -178 -179 -179 -180 -180 -181 -181 -181 -182 -182 -182 -182 -181 -179 -177 -175 -170 -163 -157 -156 -157 -154
201810 LHZ-10 AR 743 -174 -176 -176 -178 -179 -180 -180 -180 -180 -180 -181 -181 -182 -182 -181 -180 -179 -178 -176 -171 -165 -158 -157 -158 -156
201809 LHZ-10 AR 720 -174 -175 -176 -177 -178 -179 -180 -180 -180 -180 -181 -181 -182 -182 -181 -180 -179 -178 -176 -171 -164 -160 -158 -158 -155
201808 LHZ-10 AR 742 -171 -173 -174 -175 -177 -178 -179 -180 -180 -180 -181 -182 -182 -183 -182 -181 -179 -178 -176 -173 -166 -160 -159 -159 -157
201807 LHZ-10 AR 742 -171 -173 -174 -176 -177 -178 -178 -178 -179 -179 -180 -180 -181 -182 -181 -180 -179 -177 -175 -170 -164 -159 -160 -158 -154
201806 LHZ-10 AR 592 -174 -175 -176 -178 -179 -180 -180 -181 -181 -181 -181 -182 -183 -183 -182 -181 -179 -178 -175 -171 -165 -159 -157 -159 -156
201805 LHZ-10 AR 744 -173 -175 -176 -178 -179 -180 -181 -181 -181 -181 -182 -182 -183 -183 -183 -181 -180 -178 -176 -172 -165 -160 -159 -159 -156
201804 LHZ-10 AR 720 -173 -174 -176 -178 -179 -180 -180 -181 -181 -181 -181 -182 -183 -183 -183 -181 -180 -179 -177 -173 -166 -160 -158 -158 -155
201803 LHZ-10 AR 744 -173 -175 -177 -178 -180 -181 -181 -181 -181 -181 -182 -182 -183 -183 -182 -181 -179 -177 -175 -171 -163 -157 -155 -156 -152
201802 LHZ-10 AR 668 -173 -175 -176 -178 -179 -180 -181 -181 -182 -182 -182 -182 -183 -183 -182 -180 -178 -176 -174 -170 -163 -158 -156 -154 -151
201801 LHZ-10 AR 675 -173 -175 -176 -178 -179 -179 -181 -181 -181 -181 -181 -182 -182 -182 -182 -180 -179 -177 -174 -169 -163 -158 -158 -157 -153