Salem, IL Noise Levels
Salem, IL: what the federal noise map shows
At Salem, IL, road, rail and aircraft noise all fall below the 45 dB(A) floor BTS's national map can distinguish from silence. Salem's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
Where Salem ranks
Salem is one of 8,515 places in this dataset with no measurable transportation noise at all, too quiet to rank on loudness. About 7,016 people live there, making it the 4,034th largest place in this dataset.
Your street may differ from Salem's reading
For a single house or lot in Salem rather than the town-wide figure above, BTS's own map is the same free source, queried directly.
More on how this number was built
For exactly which federal dataset feeds Salem's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Salem.