Signal Hill, CA Noise Levels
Noise levels in Signal Hill, CA
At 47.5 dB(A), Signal Hill, CA falls 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. The main source is aircraft, well ahead of the other two modes BTS tracks. Treat this as Signal Hill's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
Where Signal Hill's noise comes from
BTS models these three sources separately before combining them, so a place can be quiet on two and loud on the third.
If you're weighing a move to Signal Hill
Aircraft noise is intermittent and lower-frequency, which is why FAA’s Part 150 program funds whole-envelope sound insulation for homes inside an airport’s own mapped noise contour rather than relying on window replacement alone.
How Signal Hill compares nationally
Signal Hill ranks 2,293 of 3,622 measured places nationally, 1 being the loudest this dataset covers. About 11,279 people live there, making it the 2,934th largest place in this dataset.
Checking one address in Signal Hill
Signal Hill's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where Signal Hill's figures come from
Every dB(A) figure on this page traces to a named BTS dataset, documented in the methodology guide. The guide to what actually cuts each kind of noise explains why aircraft calls for a different fix than the other two sources.