Noise Levels in University of NC at Chapel Hill, Chapel Hill, NC | Find Quiet Neighborhoods With Our Sound Map
56 dBA
Average noise across University of NC at Chapel Hill
Quiet office to normal conversation
2,632
Residents above the EPA 55 dBA threshold
37% of University of NC at Chapel Hill residents
78 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across University of NC at Chapel Hill 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 2,632 University of NC at Chapel Hill residents, or 37.2%, live above that level. By land area, 51.8% of University of NC at Chapel Hill is above 55 dBA.
48.2% below 55 dBA
51.8% above 55 dBA
See how noise in University of NC at Chapel Hill compares to similar-sized neighborhoods.
Noise by Part of University of NC at Chapel Hill
Average noise levels for University of NC at Chapel Hill residents, grouped by direction from the center of University of NC at Chapel Hill. Southern University of NC at Chapel Hill carries the highest population-weighted average; Central University of NC at Chapel Hill carries the lowest. Just 33% of residents in Central University of NC at Chapel Hill live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Southern University of NC at Chapel Hill.
Central University of NC at Chapel Hill
53.7 dBA · Moderate-loud
Quiet office to normal conversation
Northern University of NC at Chapel Hill
55.5 dBA · Moderate-loud
Quiet office to normal conversation
Southern University of NC at Chapel Hill
64.9 dBA · Loud
Busy restaurant
Western University of NC at Chapel Hill
59.7 dBA · Loud
Normal conversation an arm’s length away
Southern University of NC at Chapel Hill sounds about 117% louder than Central University of NC at Chapel Hill to the human ear, a 11.2 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 do you need to be?
produces an estimated 78 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.
At source
78 dBA
City bus interior
165 ft
64 dBA
Busy restaurant
330 ft
56 dBA
Quiet office to normal conversation
660 ft
48 dBA
Quiet office
¼ mile
40 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 24% of University of NC at Chapel Hill sits under tree canopy (heavier than most neighborhoods) and roughly 55% 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.
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Airport Noise
Raleigh-Durham International (RDU) sits east of University of NC at Chapel Hill. The U.S. Department of Transportation models aviation noise around this airport from federal traffic data, and the model uses those federal measurements rather than synthetic predictions.
Blocks under the approach and departure paths carry combined road-plus-aviation noise, with some exceeding 65 dBA on the map's Overall layer. Blocks on the opposite side of University of NC at Chapel Hill, particularly to the west, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across University of NC at Chapel Hill
The bar chart below shows the share of University of NC at Chapel Hill residents in each noise band. About 64% of residents live below the EPA's 55 dBA threshold, and roughly 13% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How University of NC at Chapel Hill Compares
University of NC at Chapel Hill sits at the quieter end of the spectrum. Below: how University of NC at Chapel Hill's average outdoor noise and share of residents above the EPA threshold compare with Old West Durham, Downtown Durham, East Durham, and Northeast Durham.
Average noise level (dBA)
University of NC at Chapel Hill's 55.5 dBA pop-weighted average is at the quieter end of the spectrum. North Carolina as a whole averages 49.7 dBA and the U.S. averages 52.0 dBA. Both are lower than University of NC at Chapel Hill because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 37.2% of University of NC at Chapel Hill residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's in the middle of its peer group. Measured by land area instead, 51.8% of University of NC at Chapel Hill's footprint sits above 55 dBA, against a North Carolina average of 22.6% and a national average of 28.1%.
What This Means if You're Moving to University of NC at Chapel Hill
- Distance from highways matters more than the neighborhood name. Two homes in the same zip code can differ by 20 dBA if one sits 100 meters from and the other 500 meters away. The model captures this at 100-meter resolution, so noise exposure changes block by block.
- Tree canopy can help reduce modeled noise exposure. Roughly 24% of University of NC at Chapel Hill is under tree cover (heavier than most neighborhoods), and the dominant land cover is medium-intensity developed land. Both are measured from federal USDA Forest Service and USGS satellite imagery at 30-meter resolution. Streets with 60% or higher canopy show 3 to 5 dBA lower noise than comparable streets with bare ground or pavement, which is why the per-place decay rate above already accounts for it.
- Airport noise is directional. Raleigh-Durham International's approach paths concentrate aviation noise to the east. Neighborhoods to the west of downtown show no measurable contribution from the airport.
