Noise Levels in Clifton Heights, Louisville, KY | Find Quiet Neighborhoods With Our Sound Map
55 dBA
Average noise across Clifton Heights
Quiet office to normal conversation
1,937
Residents above the EPA 55 dBA threshold
39% of Clifton Heights residents
77 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Clifton Heights 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.
Overall
Road
Rail
Aviation
Click the map to explore
35 dBa55 dBa (EPA limit)90+ dBa
3545557090
Quietest (dBA)Loudest
Colorblind friendlyoff
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 1,937 Clifton Heights residents, or 39.3%, live above that level. By land area, 42.0% of Clifton Heights is above 55 dBA.
Average noise levels for Clifton Heights residents, grouped by direction from the center of Clifton Heights. Eastern Clifton Heights carries the highest population-weighted average; Northern Clifton Heights carries the lowest. Just 33% of residents in Northern Clifton Heights live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Eastern Clifton Heights.
Central Clifton Heights
55.3 dBA · Moderate-loud
Quiet office to normal conversation
41% of people above 55 dBA
QuietLoud
Eastern Clifton Heights
56.9 dBA · Moderate-loud
Normal conversation an arm’s length away
47% of people above 55 dBA
QuietLoud
Northern Clifton Heights
53.4 dBA · Moderate-loud
Quiet office to normal conversation
33% of people above 55 dBA
QuietLoud
Western Clifton Heights
54.7 dBA · Moderate-loud
Quiet office to normal conversation
32% of people above 55 dBA
QuietLoud
Eastern Clifton Heights sounds about 27% louder than Northern Clifton Heights 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 Mellwood Ave do you need to be?
Mellwood Ave 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.
At source
55 dBA
Quiet office to normal conversation
165 ft
41 dBA
Soft rainfall
330 ft
35 dBA
Soft rainfall
660 ft
35 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 21% of Clifton Heights sits under tree canopy (heavier than most neighborhoods) and roughly 46% 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 Clifton Heights. 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 Clifton Heights, 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 Clifton Heights
The bar chart below shows the share of Clifton Heights residents in each noise band. About 57% of residents live below the EPA's 55 dBA threshold, and roughly 9% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Clifton Heights Compares
Clifton Heights sits at the quieter end of the spectrum. Below: how Clifton Heights's average outdoor noise and share of residents above the EPA threshold compare with Phoenix Hill, Parkland, Taylor Berry, and Belknap.
Average noise level (dBA)
Clifton Heights's 55.1 dBA pop-weighted average is at the quieter end of the spectrum. Kentucky as a whole averages 50.5 dBA and the U.S. averages 52.0 dBA. Both are lower than Clifton Heights because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 39.3% of Clifton Heights 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, 42.0% of Clifton Heights'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 Clifton Heights
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 Mellwood Ave 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 21% of Clifton Heights is under tree cover (heavier than most neighborhoods), and the dominant land cover is low-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.
Sources & Methodology
The BestNeighborhood noise model is calibrated against nearly one million federal ground-truth measurements across four states. Road noise is computed from segment-level federal traffic data and propagated outward using physics-based acoustic decay, with attenuation rates that depend on the surrounding land cover.
All inputs are published federal datasets. Block-level noise is computed by combining road, rail, and aviation sound sources in the energy domain, the same physics used in professional environmental noise assessments. Read the full methodology.
