This map shows modeled outdoor noise across Harry Floyd Terrace 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 3,605 Harry Floyd Terrace residents, or 53.1%, live above that level. By land area, 60.3% of Harry Floyd Terrace is above 55 dBA.
See how noise in Harry Floyd Terrace compares to similar-sized neighborhoods.
Noise by Part of Harry Floyd Terrace
Average noise levels for Harry Floyd Terrace residents, grouped by direction from the center of Harry Floyd Terrace. The highest population-weighted average is in northern Harry Floyd Terrace; the lowest is in western Harry Floyd Terrace, where just 36% of residents live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in the loudest section.
Northern Harry Floyd Terrace
48% of people above 55 dBA
Northwestern Harry Floyd Terrace
47% of people above 55 dBA
Southern Harry Floyd Terrace
42% of people above 55 dBA
Central Harry Floyd Terrace
36% of people above 55 dBA
Western Harry Floyd Terrace
36% of people above 55 dBA
To the human ear, noise in northern Harry Floyd Terrace sounds about 107% louder than in western Harry Floyd Terrace, a 10.5 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 do you need to be?
produces an estimated 77 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.
Calculated from the model's calibrated attenuation formula. About 10% of Harry Floyd Terrace sits under tree canopy (lighter than most neighborhoods) and roughly 53% 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.