Noise Levels in Martin Luther King, Chattanooga, TN | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across Martin Luther King
Quiet office to normal conversation
1,367
Residents above the EPA 55 dBA threshold
37% of Martin Luther King residents
69 dBA
Loudest residential point
Highway traffic 50 ft away
This map shows modeled outdoor noise across Martin Luther King 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 1,367 Martin Luther King residents, or 37.3%, live above that level. By land area, 38.6% of Martin Luther King is above 55 dBA.
61.4% below 55 dBA
38.6% above 55 dBA
See how noise in Martin Luther King compares to similar-sized neighborhoods.
Noise by Part of Martin Luther King
Average noise levels for Martin Luther King residents, grouped by direction from the center of Martin Luther King. The highest population-weighted average is in northern Martin Luther King; the lowest is in southeastern Martin Luther King, where just 37% of residents live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in the loudest section.
Northern Martin Luther King
56.5 dBA · Moderate-loud
Normal conversation an arm’s length away
Central Martin Luther King
56.0 dBA · Moderate-loud
Quiet office to normal conversation
Southeastern Martin Luther King
55.3 dBA · Moderate-loud
Quiet office to normal conversation
To the human ear, noise in northern Martin Luther King sounds about 9% louder than in southeastern Martin Luther King, a 1.2 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 69 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
69 dBA
Highway traffic 50 ft away
165 ft
56 dBA
Quiet office to normal conversation
330 ft
48 dBA
Quiet office
660 ft
40 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 9% of Martin Luther King sits under tree canopy (lighter than most neighborhoods) and roughly 68% 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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Rail Noise
Active freight rail runs through parts of Martin Luther King. For most blocks the rail-only contribution is small. Combined road-plus-rail noise rarely exceeds road noise on its own. The exceptions are the handful of blocks within roughly a quarter mile of the right-of-way during pass-through hours.
Use the Rail toggle on the map above to isolate rail's contribution from road and aviation.
Airport Noise
Lovell Field (CHA) sits east of Martin Luther King. 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 Martin Luther King, 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 Martin Luther King
The bar chart below shows the share of Martin Luther King residents in each noise band. About 67% of residents live below the EPA's 55 dBA threshold, and roughly 4% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Martin Luther King Compares
Martin Luther King sits at the quieter end of the spectrum. Below: how Martin Luther King's average outdoor noise and share of residents above the EPA threshold compare with Highland Park, Northside Community, Downtown Chattanooga, and Lookout Valley.
Average noise level (dBA)
Martin Luther King's 53.9 dBA pop-weighted average is at the quieter end of the spectrum. Tennessee as a whole averages 49.2 dBA and the U.S. averages 52.0 dBA. Both are lower than Martin Luther King because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 37.3% of Martin Luther King 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, 38.6% of Martin Luther King's footprint sits above 55 dBA, against a Tennessee average of 18.7% and a national average of 28.1%.
What This Means if You're Moving to Martin Luther King
- 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 9% of Martin Luther King is under tree cover (lighter 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. Lovell Field's approach paths concentrate aviation noise to the east. Neighborhoods to the west of downtown show no measurable contribution from the airport.
