Noise Levels in Carson Square, Indianapolis, IN | Find Quiet Neighborhoods With Our Sound Map
60 dBA
Average noise across Carson Square
Normal conversation an arm’s length away
2,944
Residents above the EPA 55 dBA threshold
63% of Carson Square residents
82 dBA
Loudest residential point
Food blender at arm’s length
This map shows modeled outdoor noise across Carson Square 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 2,944 Carson Square residents, or 63.1%, live above that level. By land area, 69.1% of Carson Square is above 55 dBA.
Average noise levels for Carson Square residents, grouped by direction from the center of Carson Square. Southern Carson Square carries the highest population-weighted average; Eastern Carson Square carries the lowest. Just 24% of residents in Eastern Carson Square live in blocks above the EPA's 55 dBA threshold, a third of the share in Southern Carson Square.
Central Carson Square
62.3 dBA · Loud
Busy restaurant
77% of people above 55 dBA
QuietLoud
Eastern Carson Square
52.6 dBA · Moderate
Quiet office to normal conversation
24% of people above 55 dBA
QuietLoud
Northern Carson Square
63.2 dBA · Loud
Busy restaurant
93% of people above 55 dBA
QuietLoud
Southern Carson Square
65.0 dBA · Loud
Busy restaurant
77% of people above 55 dBA
QuietLoud
Western Carson Square
58.1 dBA · Loud
Normal conversation an arm’s length away
59% of people above 55 dBA
QuietLoud
Southern Carson Square sounds about 136% louder than Eastern Carson Square to the human ear, a 12.4 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-65 do you need to be?
I-65 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
63 dBA
Busy restaurant
330 ft
55 dBA
Quiet office to normal conversation
660 ft
46 dBA
Quiet office
¼ mile
38 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 22% of Carson Square sits under tree canopy (heavier than most neighborhoods) and roughly 38% 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
Indianapolis International (IND) sits west of Carson Square. 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 Carson Square, particularly to the east, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Carson Square
The bar chart below shows the share of Carson Square residents in each noise band. About 27% of residents live below the EPA's 55 dBA threshold, and roughly 48% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Carson Square Compares
Carson Square sits at the louder end of the spectrum. Below: how Carson Square's average outdoor noise and share of residents above the EPA threshold compare with New Bethel, Carson Heights, Martindale-Brightwood, and Chapel Hill Village.
Average noise level (dBA)
Carson Square's 60.3 dBA pop-weighted average is at the louder end of the spectrum. Indiana as a whole averages 53.8 dBA and the U.S. averages 52.0 dBA. Both are lower than Carson Square because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 63.1% of Carson Square 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, 69.1% of Carson Square's footprint sits above 55 dBA, against a Indiana average of 37.8% and a national average of 28.1%.
What This Means if You're Moving to Carson Square
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-65 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 22% of Carson Square 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. Indianapolis International's approach paths concentrate aviation noise to the west. Neighborhoods to the east 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.
