Data for last 1 month:

Data LAFmax Time LAFmax LAFmin Time LAFmin Lnight Lday Levening LAF10 LAF90 LАden Report
2020-02-17 0.0 dB 00:00:00 0.0 dB 00:00:00 68.9 dB 0.0 dB 0.0 dB 71.4 dB 63.0 dB 0.0 dB
2020-02-16 95.8 dB 02:21:51 32.0 dB 01:52:44 34.1 dB 73.1 dB 71.2 dB 74.1 dB 67.1 dB 0.0 dB
2020-02-15 90.9 dB 03:49:46 45.3 dB 07:51:25 34.2 dB 73.6 dB 71.6 dB 74.5 dB 67.0 dB 0.0 dB
2020-02-14 89.7 dB 10:14:09 30.4 dB 03:21:53 34.9 dB 74.6 dB 74.4 dB 75.8 dB 66.2 dB 0.0 dB
2020-02-13 91.4 dB 10:42:57 29.3 dB 02:56:15 33.4 dB 73.6 dB 71.0 dB 74.5 dB 65.5 dB 0.0 dB
2020-02-12 92.9 dB 13:54:09 29.8 dB 03:05:02 34.2 dB 73.8 dB 71.0 dB 74.7 dB 66.9 dB 0.0 dB
2020-02-11 91.7 dB 15:28:41 39.8 dB 05:12:55 35.7 dB 74.9 dB 72.4 dB 76.1 dB 66.2 dB 0.0 dB
2020-02-10 90.8 dB 06:28:09 31.6 dB 01:34:11 72.0 dB 73.6 dB 70.9 dB 74.5 dB 66.4 dB 0.0 dB
2020-02-09 92.9 dB 14:33:35 30.9 dB 00:02:35 34.0 dB 73.1 dB 71.0 dB 74.0 dB 67.4 dB 0.0 dB
2020-02-08 92.2 dB 15:29:18 29.9 dB 04:20:48 34.6 dB 73.4 dB 69.5 dB 74.3 dB 66.0 dB 0.0 dB
2020-02-07 90.4 dB 17:34:49 30.0 dB 01:39:43 72.3 dB 74.1 dB 70.9 dB 75.0 dB 63.0 dB 0.0 dB
2020-02-06 92.8 dB 14:10:30 28.1 dB 03:30:54 73.5 dB 75.3 dB 70.4 dB 76.3 dB 66.9 dB 0.0 dB
2020-02-05 96.1 dB 10:34:26 31.4 dB 04:27:36 36.6 dB 74.9 dB 74.1 dB 76.0 dB 69.0 dB 0.0 dB
2020-02-04 91.0 dB 08:31:36 48.0 dB 02:24:41 35.4 dB 73.6 dB 72.8 dB 74.8 dB 65.6 dB 0.0 dB
2020-02-03 89.5 dB 17:20:33 31.4 dB 01:30:35 34.9 dB 73.5 dB 71.3 dB 74.4 dB 66.5 dB 0.0 dB
2020-02-02 90.0 dB 04:13:53 30.0 dB 04:50:05 34.1 dB 72.7 dB 71.0 dB 73.8 dB 65.6 dB 0.0 dB
2020-02-01 93.0 dB 11:26:54 48.8 dB 04:34:49 71.7 dB 73.2 dB 70.5 dB 74.2 dB 66.0 dB 0.0 dB
2020-01-31 91.1 dB 13:19:33 30.5 dB 03:14:19 35.4 dB 73.7 dB 71.3 dB 74.6 dB 66.1 dB 0.0 dB
2020-01-30 94.3 dB 15:26:02 30.6 dB 03:26:36 35.6 dB 74.1 dB 71.0 dB 74.8 dB 65.7 dB 0.0 dB
2020-01-29 104.1 dB 16:41:01 48.7 dB 01:21:11 72.9 dB 74.8 dB 71.1 dB 75.8 dB 65.6 dB 0.0 dB
2020-01-28 90.9 dB 09:28:33 29.2 dB 04:37:07 34.8 dB 73.9 dB 71.7 dB 74.8 dB 65.9 dB 0.0 dB
2020-01-27 93.0 dB 14:24:14 30.8 dB 03:36:46 33.9 dB 75.7 dB 71.5 dB 76.9 dB 66.4 dB 0.0 dB
2020-01-26 91.3 dB 01:49:39 32.0 dB 03:26:34 33.8 dB 72.7 dB 71.0 dB 73.7 dB 66.3 dB 0.0 dB
2020-01-25 97.2 dB 15:48:31 31.1 dB 02:06:57 34.8 dB 73.7 dB 71.0 dB 74.5 dB 66.6 dB 0.0 dB
2020-01-24 92.3 dB 13:41:22 31.8 dB 01:18:05 35.2 dB 74.2 dB 72.1 dB 75.1 dB 66.4 dB 0.0 dB
2020-01-23 91.8 dB 13:50:38 32.5 dB 00:39:56 35.3 dB 73.6 dB 71.1 dB 74.4 dB 65.6 dB 0.0 dB
2020-01-22 90.0 dB 12:32:23 30.5 dB 03:12:43 72.0 dB 73.4 dB 71.5 dB 74.2 dB 65.4 dB 78.4 dB
2020-01-21 89.8 dB 09:09:57 31.1 dB 00:32:31 34.2 dB 73.8 dB 71.6 dB 74.6 dB 66.9 dB 0.0 dB
2020-01-20 91.7 dB 11:13:40 28.6 dB 02:07:25 34.3 dB 73.8 dB 71.4 dB 74.6 dB 65.5 dB 0.0 dB
2020-01-19 90.4 dB 07:00:53 29.1 dB 03:19:18 34.9 dB 72.7 dB 70.2 dB 73.7 dB 65.7 dB 0.0 dB
2020-01-18 94.1 dB 15:36:44 31.3 dB 04:22:54 34.9 dB 73.0 dB 70.4 dB 74.6 dB 66.7 dB 0.0 dB
2020-01-17 99.7 dB 17:59:21 30.0 dB 01:47:04 34.7 dB 74.8 dB 72.0 dB 75.5 dB 65.5 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 = 68.9 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 = N/A 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 = N/A 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 = N/A 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 = 71.4 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 = 63.0 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.