Data for last 1 month:

Data LAFmax Time LAFmax LAFmin Time LAFmin Lnight Lday Levening LAF10 LAF90 LАden Report
2020-07-04 93.8 dB 11:42:27 47.8 dB 02:40:51 71.3 dB 73.4 dB 0.0 dB 74.1 dB 65.5 dB 80.7 dB
2020-07-03 101.7 dB 06:36:40 47.7 dB 00:55:13 33.7 dB 74.4 dB 72.1 dB 75.4 dB 65.4 dB 0.0 dB
2020-07-02 99.0 dB 16:15:30 47.8 dB 00:11:37 34.5 dB 73.6 dB 71.3 dB 74.2 dB 66.4 dB 0.0 dB
2020-07-01 90.7 dB 06:46:16 47.8 dB 16:22:23 34.6 dB 73.3 dB 71.2 dB 74.0 dB 66.6 dB 0.0 dB
2020-06-30 96.1 dB 10:33:21 48.3 dB 00:43:17 72.4 dB 73.7 dB 70.9 dB 74.3 dB 66.1 dB 0.0 dB
2020-06-29 93.1 dB 09:23:13 48.5 dB 00:04:20 33.1 dB 74.0 dB 72.0 dB 74.7 dB 66.7 dB 0.0 dB
2020-06-28 100.8 dB 16:11:38 47.5 dB 17:15:53 34.2 dB 72.7 dB 71.6 dB 73.6 dB 67.7 dB 0.0 dB
2020-06-27 90.3 dB 10:47:56 48.3 dB 01:06:40 34.9 dB 73.3 dB 71.4 dB 74.1 dB 67.0 dB 0.0 dB
2020-06-26 98.7 dB 15:38:13 48.3 dB 00:01:12 34.5 dB 73.9 dB 71.7 dB 74.7 dB 66.8 dB 0.0 dB
2020-06-25 92.3 dB 12:01:42 48.4 dB 01:05:35 34.4 dB 73.7 dB 71.5 dB 74.6 dB 66.2 dB 0.0 dB
2020-06-24 95.6 dB 12:39:10 48.4 dB 00:03:58 35.0 dB 74.1 dB 71.7 dB 74.8 dB 66.7 dB 0.0 dB
2020-06-23 91.8 dB 12:24:07 48.3 dB 04:04:55 35.4 dB 75.4 dB 73.7 dB 76.5 dB 67.0 dB 0.0 dB
2020-06-22 93.1 dB 12:41:55 48.5 dB 02:02:31 34.1 dB 73.7 dB 71.1 dB 74.4 dB 67.3 dB 0.0 dB
2020-06-21 91.8 dB 11:47:09 48.6 dB 02:52:41 34.3 dB 73.0 dB 72.0 dB 73.9 dB 65.7 dB 0.0 dB
2020-06-20 92.7 dB 14:14:37 48.5 dB 03:37:06 72.1 dB 73.7 dB 71.4 dB 74.6 dB 65.7 dB 0.0 dB
2020-06-19 94.1 dB 14:13:06 48.3 dB 00:04:34 33.7 dB 73.9 dB 72.1 dB 74.5 dB 65.0 dB 0.0 dB
2020-06-18 95.0 dB 08:00:16 48.4 dB 03:07:20 34.4 dB 74.0 dB 71.7 dB 74.7 dB 65.8 dB 0.0 dB
2020-06-17 90.4 dB 09:12:27 48.7 dB 00:11:36 34.3 dB 74.0 dB 71.2 dB 74.8 dB 66.5 dB 0.0 dB
2020-06-16 96.5 dB 12:59:57 48.5 dB 03:39:54 72.5 dB 73.9 dB 72.2 dB 74.8 dB 66.5 dB 0.0 dB
2020-06-15 96.1 dB 14:17:19 48.4 dB 01:21:50 34.0 dB 74.0 dB 71.6 dB 74.9 dB 66.1 dB 0.0 dB
2020-06-14 92.0 dB 07:19:11 48.4 dB 03:00:20 71.4 dB 72.7 dB 71.8 dB 73.8 dB 65.5 dB 0.0 dB
2020-06-13 93.2 dB 11:48:53 48.5 dB 00:40:46 34.1 dB 73.9 dB 72.4 dB 75.1 dB 67.3 dB 0.0 dB
2020-06-12 90.2 dB 15:49:58 48.5 dB 01:53:36 33.9 dB 75.1 dB 71.7 dB 76.1 dB 64.9 dB 0.0 dB
2020-06-11 95.4 dB 13:17:16 48.6 dB 02:17:45 72.9 dB 74.8 dB 71.3 dB 75.8 dB 64.8 dB 0.0 dB
2020-06-10 91.5 dB 14:50:21 48.6 dB 03:00:53 33.9 dB 73.5 dB 71.0 dB 74.2 dB 63.9 dB 0.0 dB
2020-06-09 89.2 dB 14:04:31 48.6 dB 00:06:28 72.0 dB 73.5 dB 71.1 dB 74.4 dB 65.3 dB 0.0 dB
2020-06-08 93.9 dB 11:15:40 48.7 dB 02:22:28 33.8 dB 73.6 dB 71.0 dB 74.5 dB 66.2 dB 0.0 dB
2020-06-07 94.0 dB 13:55:29 47.6 dB 14:55:11 71.4 dB 72.6 dB 71.4 dB 73.8 dB 65.9 dB 0.0 dB
2020-06-06 93.1 dB 10:12:42 48.4 dB 00:09:55 34.5 dB 73.2 dB 70.9 dB 74.1 dB 64.3 dB 0.0 dB
2020-06-05 99.9 dB 07:05:37 48.6 dB 01:59:34 72.2 dB 74.0 dB 71.4 dB 74.6 dB 64.1 dB 0.0 dB
2020-06-04 96.3 dB 14:36:19 48.9 dB 00:10:51 33.9 dB 74.0 dB 70.8 dB 74.8 dB 64.6 dB 0.0 dB


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


Daily indicators:



  L24 = 80.7 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 = 71.3 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 = 73.4 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. = N/A 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 = 93.8 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 = 47.8 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 = 74.1 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 = 65.5 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.