Noise Levels in Perry Hall, MD | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across Perry Hall
Quiet office to normal conversation
10,385
Residents above the EPA 55 dBA threshold
28% of Perry Hall residents
83 dBA
Loudest residential point
Food blender at arm’s length
This map shows modeled outdoor noise across Perry Hall 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 10,385 Perry Hall residents, or 28.0%, live above that level. By land area, 31.0% of Perry Hall is above 55 dBA.
Average noise levels for Perry Hall residents, grouped by direction from the center of Perry Hall. Southern Perry Hall carries the highest population-weighted average; Northern Perry Hall carries the lowest. Just 22% of residents in Northern Perry Hall live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Southern Perry Hall.
Central Perry Hall
52.7 dBA · Moderate
Quiet office to normal conversation
26% of people above 55 dBA
QuietLoud
Eastern Perry Hall
53.8 dBA · Moderate-loud
Quiet office to normal conversation
28% of people above 55 dBA
QuietLoud
Northern Perry Hall
51.9 dBA · Moderate
Quiet office to normal conversation
22% of people above 55 dBA
QuietLoud
Southern Perry Hall
57.2 dBA · Moderate-loud
Normal conversation an arm’s length away
39% of people above 55 dBA
QuietLoud
Western Perry Hall
52.9 dBA · Moderate
Quiet office to normal conversation
24% of people above 55 dBA
QuietLoud
Southern Perry Hall sounds about 44% louder than Northern Perry Hall to the human ear, a 5.3 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 John F Kennedy Memorial Hwy do you need to be?
John F Kennedy Memorial Hwy produces an estimated 80 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 quiet suburban street at night.
At source
80 dBA
City bus interior
165 ft
67 dBA
Highway traffic 50 ft away
330 ft
60 dBA
Normal conversation an arm’s length away
660 ft
52 dBA
Quiet office to normal conversation
¼ mile
45 dBA
Quiet suburban street at night
½ mile
37 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 37% of Perry Hall sits under tree canopy (about average for cities) and roughly 29% 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
Baltimore/Washington International Thurgood Marshall (BWI) sits southwest of Perry Hall. The U.S. Department of Transportation measures aviation noise around this airport directly, 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 75 dBA on the map's Overall layer. Blocks on the opposite side of Perry Hall, particularly to the northeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Perry Hall
The bar chart below shows the share of Perry Hall residents in each noise band. About 75% of residents live below the EPA's 55 dBA threshold, and roughly 14% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Perry Hall Compares
Perry Hall sits at the louder end of the spectrum. Below: how Perry Hall's average outdoor noise and share of residents above the EPA threshold compare with Parkville, Essex, Middle River, and Bel Air North.
Average noise level (dBA)
Perry Hall's 53.9 dBA pop-weighted average is at the louder end of the spectrum. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Perry Hall because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 28.0% of Perry Hall 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, 31.0% of Perry Hall's footprint sits above 55 dBA, against a Maryland average of 32.9% and a national average of 28.1%.
What This Means if You're Moving to Perry Hall
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 John F Kennedy Memorial Hwy 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 37% of Perry Hall is under tree cover (about average for cities), 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. Baltimore/Washington International Thurgood Marshall's approach paths concentrate aviation noise to the southwest. Neighborhoods to the northeast 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.
