St. John, MO Noise Levels
Is St. John, MO noisy?
St. John, MO reads 47.5 dB(A) on BTS's 24-hour average, inside HUD's "Acceptable" noise zone, 65 dB(A) day-night average or below under 24 CFR 51.104, the federal government's own line for building housing with no extra sound attenuation required. Aircraft drives that number here, not the other two sources. Treat this as St. John's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
St. John's noise, by source
Each of the three transportation modes gets its own model from BTS; the combined figure above is what they add up to.
What this means for a house here
Aircraft noise is intermittent and lower-frequency, which is why FAA’s Part 150 program funds whole-envelope sound insulation for homes inside an airport’s own mapped noise contour rather than relying on window replacement alone.
Where St. John ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, St. John ranks 2,515, loudest first. About 6,472 people live there, making it the 4,238th largest place in this dataset.
Your street may differ from St. John's reading
This page describes St. John as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind St. John's reading
The methodology guide shows exactly how St. John's reading was built from BTS's tile data. Since aircraft is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.