Northbrook, IL Noise Levels
Is Northbrook, IL noisy?
Northbrook, IL reads 52.5 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. Rail traffic drives that number here, not the other two sources. This describes Northbrook as a whole, not a specific block, the underlying BTS map resolves to about 38 meters per pixel, sampled at the town's own center point.
Northbrook'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
The same window and door upgrades that work on road noise also cut broadband rail noise, though very low-frequency freight rumble travels through walls, not just glass.
Where Northbrook ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, Northbrook ranks 892, loudest first. About 34,546 people live there, making it the 1,192th largest place in this dataset.
Your street may differ from Northbrook's reading
This page describes Northbrook as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind Northbrook's reading
The methodology guide shows exactly how Northbrook's reading was built from BTS's tile data. Since rail traffic is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.