Data for last 1 month:

Data LAFmax Time LAFmax LAFmin Time LAFmin Lnight Lday Levening LAF10 LAF90 LАden Report
2020-08-07 98.6 dB 10:55:54 48.4 dB 03:03:20 73.0 dB 74.7 dB 0.0 dB 75.5 dB 66.4 dB 82.4 dB
2020-08-06 91.9 dB 16:47:57 48.2 dB 03:01:14 73.4 dB 74.5 dB 75.4 dB 75.1 dB 67.8 dB 0.0 dB
2020-08-05 96.2 dB 03:04:02 48.0 dB 05:41:12 34.9 dB 75.5 dB 71.8 dB 76.9 dB 66.6 dB 0.0 dB
2020-08-04 94.4 dB 01:45:37 48.3 dB 04:00:30 34.7 dB 74.2 dB 71.4 dB 75.1 dB 66.6 dB 0.0 dB
2020-08-03 103.7 dB 12:41:40 48.3 dB 02:40:34 34.7 dB 74.5 dB 71.3 dB 75.0 dB 66.9 dB 0.0 dB
2020-08-02 96.5 dB 14:58:22 47.8 dB 15:37:01 35.4 dB 72.9 dB 72.2 dB 74.1 dB 67.4 dB 0.0 dB
2020-08-01 93.1 dB 16:07:26 48.0 dB 03:56:24 35.2 dB 73.8 dB 71.7 dB 74.7 dB 66.5 dB 0.0 dB
2020-07-31 92.5 dB 14:28:46 48.1 dB 00:45:43 72.6 dB 74.2 dB 71.7 dB 75.0 dB 66.0 dB 0.0 dB
2020-07-30 99.4 dB 07:01:18 47.9 dB 16:23:51 34.7 dB 74.1 dB 71.8 dB 74.9 dB 66.5 dB 0.0 dB
2020-07-29 100.3 dB 07:05:45 48.3 dB 02:11:18 72.6 dB 74.2 dB 71.7 dB 74.9 dB 66.0 dB 0.0 dB
2020-07-28 93.8 dB 10:31:27 48.2 dB 01:10:16 34.5 dB 73.9 dB 71.8 dB 74.9 dB 65.8 dB 0.0 dB
2020-07-27 91.1 dB 18:25:36 48.4 dB 00:14:20 35.1 dB 74.0 dB 71.7 dB 74.9 dB 67.8 dB 0.0 dB
2020-07-26 93.1 dB 17:37:01 48.2 dB 01:28:32 71.7 dB 72.8 dB 71.4 dB 73.9 dB 68.1 dB 0.0 dB
2020-07-25 96.0 dB 17:48:11 48.0 dB 05:02:50 35.5 dB 74.0 dB 73.9 dB 75.2 dB 67.0 dB 0.0 dB
2020-07-24 92.2 dB 07:44:42 47.9 dB 02:46:28 34.6 dB 74.3 dB 72.6 dB 75.2 dB 65.3 dB 0.0 dB
2020-07-23 93.2 dB 13:50:13 48.3 dB 02:07:08 72.4 dB 73.8 dB 71.7 dB 74.6 dB 66.1 dB 0.0 dB
2020-07-22 92.2 dB 17:11:26 48.4 dB 00:27:41 72.5 dB 73.9 dB 71.4 dB 74.6 dB 66.9 dB 0.0 dB
2020-07-21 98.0 dB 11:33:55 48.4 dB 01:15:01 34.4 dB 74.1 dB 71.4 dB 74.7 dB 66.0 dB 0.0 dB
2020-07-20 98.9 dB 17:25:39 48.1 dB 00:05:07 34.0 dB 74.0 dB 71.7 dB 74.5 dB 67.2 dB 0.0 dB
2020-07-19 97.2 dB 09:29:56 48.4 dB 04:40:55 72.1 dB 72.8 dB 71.7 dB 73.8 dB 67.6 dB 0.0 dB
2020-07-18 91.1 dB 11:35:01 48.2 dB 01:42:05 34.6 dB 76.3 dB 73.7 dB 77.3 dB 67.0 dB 0.0 dB
2020-07-17 113.1 dB 12:01:31 48.4 dB 01:15:31 73.8 dB 75.6 dB 71.7 dB 74.5 dB 65.8 dB 0.0 dB
2020-07-16 95.0 dB 11:22:25 48.5 dB 02:30:56 72.5 dB 74.1 dB 71.5 dB 74.9 dB 66.7 dB 0.0 dB
2020-07-15 92.0 dB 08:12:46 48.2 dB 02:04:44 35.1 dB 74.1 dB 72.0 dB 75.0 dB 67.1 dB 0.0 dB
2020-07-14 96.5 dB 08:36:29 48.5 dB 00:12:44 34.2 dB 73.9 dB 71.9 dB 74.6 dB 65.9 dB 0.0 dB
2020-07-13 95.8 dB 16:24:41 48.8 dB 05:02:07 35.6 dB 74.3 dB 72.1 dB 75.0 dB 68.2 dB 0.0 dB
2020-07-12 95.0 dB 02:30:10 48.4 dB 03:17:21 71.7 dB 72.8 dB 71.6 dB 73.8 dB 67.0 dB 0.0 dB
2020-07-11 95.1 dB 18:03:03 48.3 dB 03:28:11 33.6 dB 73.5 dB 71.2 dB 74.5 dB 66.9 dB 0.0 dB
2020-07-10 98.3 dB 10:15:28 48.5 dB 04:12:47 34.8 dB 74.0 dB 72.3 dB 74.6 dB 66.0 dB 0.0 dB
2020-07-09 91.0 dB 06:04:53 48.2 dB 12:36:05 72.4 dB 73.8 dB 72.2 dB 74.7 dB 66.0 dB 0.0 dB
2020-07-08 92.2 dB 15:25:42 48.5 dB 00:55:58 34.7 dB 74.1 dB 72.1 dB 74.8 dB 66.6 dB 0.0 dB
2020-07-07 95.5 dB 05:57:28 48.1 dB 01:06:06 34.1 dB 74.2 dB 71.5 dB 75.2 dB 67.1 dB 0.0 dB


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


Daily indicators:



  L24 = 82.4 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 = 73.0 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 = 74.7 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. = 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 = 98.6 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 = 48.4 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 = 75.5 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 = 66.4 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.