Salem, OR Noise Levels
Salem, OR: what the federal noise map shows
Salem, OR 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. This describes Salem 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.
Salem'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.
Where Salem ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, Salem ranks 1,801, loudest first. By population, it ranks 150 of the 12,137 places in this dataset, home to about 180,406 people.
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.