This map shows modeled outdoor noise across 37733 at 100-meter resolution, combining road, aviation, and rail sources. Green areas measure below 45 dBA. Orange and red exceed the EPA's 55 dBA outdoor threshold linked to long-term health effects. Use the layer toggles to view each source on its own or all together.
What the numbers sound like
- 30 dBAWhisper
- 40 dBASoft rainfall
- 45 dBAQuiet suburban street at night
- 50 dBAQuiet office
- 55 dBAEPA outdoor threshold: light traffic 100 ft away
- 60 dBANormal conversation an arm's length away
- 65 dBABusy restaurant
- 70 dBAHighway traffic 50 ft away
- 80 dBACity bus interior
Population Above the EPA Outdoor Threshold
The EPA's 55 dBA outdoor reference level is a common benchmark for residential noise exposure, especially for activity interference, annoyance, and long-term community noise concerns. About 0 37733 residents, or 0.5%, live above that level. By land area, 0.3% of 37733 is above 55 dBA.
See how noise in 37733 compares to similar-sized zip codes.
Noise by Part of 37733
Average noise levels for 37733 residents, grouped by direction from the center of 37733. Eastern 37733 carries the highest population-weighted average; Western 37733 carries the lowest. Just 0% of residents in Western 37733 live in blocks above the EPA's 55 dBA threshold, a fraction of the share in Eastern 37733.
Central 37733
2% of people above 55 dBA
Eastern 37733
0% of people above 55 dBA
Southern 37733
2% of people above 55 dBA
Western 37733
0% of people above 55 dBA
Eastern 37733 sounds about 27% louder than Western 37733 to the human ear, a 3.5 dBA gap. Every 10 dBA roughly doubles perceived loudness. Within any of these directions, two homes a quarter mile apart can still differ by 10 or more dBA depending on how close they sit to a major highway.
How far back from A206 do you need to be?
A206 produces an estimated 55 dBA at its loudest centerline points. Noise drops logarithmically with distance, with the exact rate depending on what's between you and the road. Tree cover, walls, terrain, and pavement type all matter. At roughly a quarter mile back, traffic fades into the noise level of a soft rainfall.
Calculated from the model's calibrated attenuation formula. About 85% of 37733 sits under tree canopy (much heavier than most zip codes) and roughly 0% is impervious surface like pavement and rooftops. Both are folded into the per-place decay rate above. Heavier canopy pulls noise down faster with distance; impervious surfaces slow the drop.