Data for last 1 month:

Data LAFmax Time LAFmax LAFmin Time LAFmin Lnight Lday Levening LAF10 LAF90 LАden Report
2020-09-20 99.7 dB 01:26:40 48.6 dB 16:39:04 35.4 dB 72.7 dB 71.6 dB 73.8 dB 66.2 dB 0.0 dB
2020-09-19 98.5 dB 11:08:56 48.4 dB 02:04:36 34.7 dB 74.3 dB 71.1 dB 75.3 dB 67.1 dB 0.0 dB
2020-09-18 90.5 dB 07:29:49 48.4 dB 01:11:46 33.6 dB 74.7 dB 71.5 dB 75.4 dB 65.7 dB 0.0 dB
2020-09-17 92.6 dB 08:21:55 48.5 dB 03:21:55 34.3 dB 74.8 dB 70.6 dB 75.7 dB 65.8 dB 0.0 dB
2020-09-16 90.0 dB 10:48:23 48.6 dB 00:27:36 34.2 dB 74.9 dB 71.6 dB 75.9 dB 67.1 dB 0.0 dB
2020-09-15 93.4 dB 13:02:56 48.6 dB 03:31:06 34.9 dB 75.0 dB 76.8 dB 75.9 dB 67.7 dB 0.0 dB
2020-09-14 90.9 dB 07:07:41 48.4 dB 11:48:45 35.6 dB 74.6 dB 71.8 dB 75.4 dB 67.4 dB 0.0 dB
2020-09-13 97.2 dB 14:02:58 48.7 dB 01:13:45 35.3 dB 73.0 dB 71.8 dB 73.6 dB 67.0 dB 0.0 dB
2020-09-12 98.1 dB 17:35:06 48.7 dB 02:02:09 34.9 dB 74.2 dB 71.5 dB 75.2 dB 67.1 dB 0.0 dB
2020-09-11 90.1 dB 11:32:40 48.7 dB 02:25:11 33.5 dB 74.3 dB 71.9 dB 75.0 dB 66.2 dB 0.0 dB
2020-09-10 104.9 dB 16:50:11 48.7 dB 01:56:34 34.3 dB 74.5 dB 72.1 dB 75.0 dB 66.0 dB 0.0 dB
2020-09-09 92.3 dB 12:51:34 47.9 dB 15:01:05 34.0 dB 74.3 dB 71.8 dB 75.2 dB 67.1 dB 0.0 dB
2020-09-08 95.1 dB 18:16:16 48.7 dB 02:44:38 34.6 dB 74.6 dB 71.8 dB 75.6 dB 67.5 dB 0.0 dB
2020-09-07 92.2 dB 13:44:44 47.7 dB 15:41:43 34.7 dB 73.7 dB 71.3 dB 74.9 dB 66.6 dB 0.0 dB
2020-09-06 94.1 dB 07:29:48 47.5 dB 15:49:32 34.5 dB 72.7 dB 71.5 dB 73.7 dB 67.2 dB 0.0 dB
2020-09-05 90.6 dB 12:08:39 47.6 dB 16:18:08 72.6 dB 74.1 dB 71.4 dB 74.9 dB 67.4 dB 0.0 dB
2020-09-04 99.7 dB 18:12:54 49.2 dB 04:05:25 40.5 dB 75.1 dB 72.2 dB 75.8 dB 67.3 dB 0.0 dB
2020-09-03 93.5 dB 18:23:13 49.5 dB 04:40:56 73.2 dB 74.6 dB 72.9 dB 75.5 dB 67.5 dB 0.0 dB
2020-09-02 95.0 dB 17:28:52 49.7 dB 04:51:42 34.9 dB 74.4 dB 71.8 dB 75.3 dB 68.0 dB 0.0 dB
2020-09-01 93.9 dB 13:42:35 48.8 dB 02:53:34 36.1 dB 74.1 dB 71.5 dB 74.8 dB 67.1 dB 0.0 dB
2020-08-31 93.6 dB 13:19:10 48.3 dB 14:57:43 72.8 dB 74.3 dB 71.4 dB 75.2 dB 67.6 dB 0.0 dB
2020-08-30 96.1 dB 17:47:08 48.0 dB 15:33:50 72.4 dB 73.6 dB 71.4 dB 74.5 dB 67.3 dB 0.0 dB
2020-08-29 90.8 dB 13:49:18 49.4 dB 15:06:03 35.1 dB 74.0 dB 71.7 dB 74.8 dB 68.3 dB 0.0 dB
2020-08-28 93.1 dB 18:16:38 52.8 dB 16:16:36 34.8 dB 74.1 dB 72.1 dB 74.7 dB 69.4 dB 0.0 dB
2020-08-27 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-26 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-25 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-24 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-23 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-22 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-21 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB
2020-08-20 0.0 dB 00:00:00 0.0 dB 00:00:00 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB 0.0 dB


To automated count unit ID 3086: Route I-8, Kalotina - Sofia


Daily indicators:



  L24 = N/A dBL2424-hour noise level, which is an indicator of the noise associated with discomfort (defined according to the ”Law for protection against environmental noise”)

  Lnight = 35.4 dBLAnightnight noise level is the A-weighted equivalent noise level averaged over a long period of time, relative to all the night periods in a year, as specified in standard ISO 1996-2:1987

Defined period "night period: (according to the Regulation No 6 of 26 June 2006 for" performance of noise in the environment "): 23- 07 h


  Lday = 72.7 dBInformationLAdaydaily noise level is the A-weighted equivalent noise level averaged over a long period of time, relative to all the day periods during the year, as specified in the standard BDS ISO 1996-2: 1987;

Defined period "day period" (according to Regulation No 6 of 26 June 2006 on "indicators of environmental noise"): 07-19 h.


  Lev. = 71.6 dBInformationLAeveningevening level of noise is the A-weighted equivalent noise level averaged over a long period of time, relative to all the evening periods in a year, as specified in standard ISO 1996-2: 1987;

Defined period "evening period: (according to the Regulation No 6 of 26 June 2006 for" performance of noise in the environment "): 19 – 23 h.


  LAmax = 99.7 dBInformationLAmaxmaximum A-weighted sound level in decibels [dB (A)].
This is the maximum value of the current A-weighted noise level for a given time interval.


  LAmin = 48.6 dBInformationLAminminimum A-weighted sound level in decibels [dB (A)].
This is the minimum value of the current A-weighted noise level for a given time interval.


  LAF10 = 73.8 dBLAF10The level of noise along a curve and which has exceeded 10% of the measurement time (T).
The parameter is used as a measure of the noise from the main measured (released) source.


  LAF90 = 66.2 dBLAF90The noise level in a curve which is exceeded for 90% of the time of measurement (T).
The parameter is used as an indicator of the ambient (background) noise.