Traffic
Every road gets an emission level by type, from motorways to residential streets. Sound decays with distance like a line source.
How the score is computed
A simplified acoustic model applied to open data. Transparent and reproducible.
Airports
Runways of nearby airports count as long-range sources, with more weight for international airports.
Local sources
Railways, industrial zones, stadiums, bars and nightclubs add to the background noise of the area.
Noise by city and neighbourhood
The Sossego Index of every neighbourhood in the 27 state capitals, from the quietest capital to the loudest.
- 1.Rio BrancoAC · 129 neighbourhoods85
- 2.Porto VelhoRO · 94 neighbourhoods83
- 3.CuiabáMT · 265 neighbourhoods80
- 4.MaceióAL · 68 neighbourhoods80
- 5.BelémPA · 130 neighbourhoods79
- 6.TeresinaPI · 454 neighbourhoods79
- 7.PalmasTO · 17 neighbourhoods78
- 8.FlorianópolisSC · 232 neighbourhoods77
- 9.Campo GrandeMS · 709 neighbourhoods76
- 10.Porto AlegreRS · 296 neighbourhoods76
- 11.BrasíliaDF · 483 neighbourhoods75
- 12.GoiâniaGO · 419 neighbourhoods75
- 13.MacapáAP · 65 neighbourhoods75
- 14.ManausAM · 67 neighbourhoods75
- 15.João PessoaPB · 71 neighbourhoods73
- 16.Boa VistaRR · 70 neighbourhoods72
- 17.CuritibaPR · 88 neighbourhoods72
- 18.Rio de JaneiroRJ · 295 neighbourhoods71
- 19.SalvadorBA · 155 neighbourhoods71
- 20.São PauloSP · 452 neighbourhoods71
- 21.AracajuSE · 55 neighbourhoods70
- 22.FortalezaCE · 150 neighbourhoods70
- 23.NatalRN · 147 neighbourhoods70
- 24.São LuísMA · 323 neighbourhoods70
- 25.VitóriaES · 80 neighbourhoods70
- 26.RecifePE · 139 neighbourhoods68
- 27.Belo HorizonteMG · 486 neighbourhoods67