Noise Levels in Geist, Indianapolis, IN | Find Quiet Neighborhoods With Our Sound Map
55 dBA
Average noise across Geist
Quiet office to normal conversation
1,628
Residents above the EPA 55 dBA threshold
35% of Geist residents
65 dBA
Loudest residential point
Busy restaurant
This map shows modeled outdoor noise across Geist 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 1,628 Geist residents, or 35.0%, live above that level. By land area, 28.7% of Geist is above 55 dBA.
Average noise levels for Geist residents, grouped by direction from the center of Geist. Southern Geist carries the highest population-weighted average; Western Geist carries the lowest. Just 20% of residents in Western Geist live in blocks above the EPA's 55 dBA threshold, a third of the share in Southern Geist.
Central Geist
56.9 dBA · Moderate-loud
Normal conversation an arm’s length away
49% of people above 55 dBA
QuietLoud
Eastern Geist
55.9 dBA · Moderate-loud
Quiet office to normal conversation
37% of people above 55 dBA
QuietLoud
Northern Geist
54.4 dBA · Moderate-loud
Quiet office to normal conversation
23% of people above 55 dBA
QuietLoud
Southern Geist
60.9 dBA · Loud
Normal conversation an arm’s length away
86% of people above 55 dBA
QuietLoud
Western Geist
52.1 dBA · Moderate
Quiet office to normal conversation
20% of people above 55 dBA
QuietLoud
Southern Geist sounds about 84% louder than Western Geist to the human ear, a 8.8 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 Old Stone Dr do you need to be?
Old Stone Dr produces an estimated 59 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
59 dBA
Normal conversation an arm’s length away
165 ft
45 dBA
Quiet suburban street at night
330 ft
38 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 34% of Geist sits under tree canopy (much heavier than most neighborhoods) and roughly 32% 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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How Noise Is Distributed Across Geist
The bar chart below shows the share of Geist residents in each noise band. About 29% of residents live below the EPA's 55 dBA threshold, and roughly 2% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Geist Compares
Geist sits at the quieter end of the spectrum. Below: how Geist's average outdoor noise and share of residents above the EPA threshold compare with Martindale-Brightwood, Hearth Stone, Broad Ripple, and New Bethel.
Average noise level (dBA)
Geist's 55.2 dBA pop-weighted average is at the quieter end of the spectrum. Indiana as a whole averages 53.8 dBA and the U.S. averages 52.0 dBA. Both are lower than Geist because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 35.0% of Geist 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, 28.7% of Geist'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 Geist
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 Old Stone Dr 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 34% of Geist is under tree cover (much 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.
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.
