Noise Levels in Central Business District, Louisville, KY | Find Quiet Neighborhoods With Our Sound Map
61 dBA
Average noise across Central Business District
Normal conversation an arm’s length away
1,728
Residents above the EPA 55 dBA threshold
92% of Central Business District residents
84 dBA
Loudest residential point
Food blender at arm’s length
This map shows modeled outdoor noise across Central Business District 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 1,728 Central Business District residents, or 91.5%, live above that level. By land area, 90.3% of Central Business District is above 55 dBA.
9.7% below 55 dBA
90.3% above 55 dBA
See how noise in Central Business District compares to similar-sized neighborhoods.
Noise by Part of Central Business District
Average noise levels for Central Business District residents, grouped by direction from the center of Central Business District. The highest population-weighted average is in northeastern Central Business District; the lowest is in western Central Business District, where just 80% of residents live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in the loudest section.
Northeastern Central Business District
70.3 dBA · Loud
Highway traffic 50 ft away
Central Central Business District
69.0 dBA · Loud
Highway traffic 50 ft away
Southeastern Central Business District
65.0 dBA · Loud
Busy restaurant
Southern Central Business District
64.6 dBA · Loud
Busy restaurant
Western Central Business District
63.5 dBA · Loud
Busy restaurant
To the human ear, noise in northeastern Central Business District sounds about 60% louder than in western Central Business District, a 6.8 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 I-64 do you need to be?
I-64 produces an estimated 79 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
79 dBA
City bus interior
165 ft
64 dBA
Busy restaurant
330 ft
56 dBA
Quiet office to normal conversation
660 ft
47 dBA
Quiet office
¼ mile
39 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 0% of Central Business District sits under tree canopy (much lighter than most neighborhoods) and roughly 83% 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
Louisville Muhammad Ali International (SDF) sits south of Central Business District. 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 55 dBA on the map's Overall layer. Blocks on the opposite side of Central Business District, particularly to the north, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Central Business District
The bar chart below shows the share of Central Business District residents in each noise band. About 2% of residents live below the EPA's 55 dBA threshold, and roughly 60% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Central Business District Compares
Central Business District sits at the louder end of the spectrum. Below: how Central Business District's average outdoor noise and share of residents above the EPA threshold compare with bonnycastle-louisville-ky, poplar-level-louisville-ky, prestonia-louisville-ky, and gardiner-lane-louisville-ky.
Average noise level (dBA)
Central Business District's 60.7 dBA pop-weighted average is at the louder end of the spectrum. Kentucky as a whole averages 50.5 dBA and the U.S. averages 52.0 dBA. Both are lower than Central Business District because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 91.5% of Central Business District residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's more than any of its peer group. Measured by land area instead, 90.3% of Central Business District's footprint sits above 55 dBA, against a Kentucky average of 23.2% and a national average of 28.1%.
What This Means if You're Moving to Central Business District
- 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 I-64 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 0% of Central Business District is under tree cover (much lighter than most neighborhoods), and the dominant land cover is high-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. Louisville Muhammad Ali International's approach paths concentrate aviation noise to the south. Neighborhoods to the north of downtown show no measurable contribution from the airport.
