Spearfish, SD Noise Levels
How loud is Spearfish, SD?
None of the three transportation sources BTS models, road, rail or aircraft, register above 45 dB(A) at Spearfish, SD. That figure is sampled at one coordinate, the Census Bureau's own internal point for Spearfish, not a street-by-street survey of the whole place.
How Spearfish compares nationally
Spearfish is one of 8,515 places in this dataset with no measurable transportation noise at all, too quiet to rank on loudness. By population, it ranks 2,546 of the 12,137 places in this dataset, home to about 13,803 people.
Checking one address in Spearfish
Nothing here substitutes for checking one address in Spearfish directly, and BTS's own map lets anyone do that at no cost.
Spearfish's number isn't a one-off calculation, it comes from the same method covered in the methodology guide. See the why New York City shows up quiet here too for why a real place can show no reading at all.