Cortland, IL Noise Levels
Noise levels in Cortland, IL
Cortland, IL doesn't clear BTS's 45 dB(A) measurement floor on any of the three transportation sources it tracks, road, rail or aircraft.
That figure is sampled at one coordinate, the Census Bureau's own internal point for Cortland, not a street-by-street survey of the whole place.
How Cortland compares nationally
There's no loudness rank for Cortland: it's one of 8,515 places nationally where BTS's model measures nothing above its 45 dB(A) floor. About 4,592 people live there, making it the 5,122th largest place in this dataset.
Checking one address in Cortland
Cortland's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where Cortland's figures come from
Every dB(A) figure on this page traces to a named BTS dataset, documented in the methodology guide. Curious why Cortland reads as quiet? The explanation of what a quiet result actually means covers it.