Noise from Specific Sources
Local helicopter operating restrictions, including hospital and police flight paths, late-night limits, and complaint reporting (LA has a dedicated helicopter complaint program).
8 locations
Noise limits for air conditioners, heat pumps, pool equipment, and other mechanical systems, including decibel thresholds measured at the property line.
Noise regulations specific to bars, nightclubs, and entertainment venues, including bass frequency limits, soundproofing requirements, and complaint procedures.
Maximum duration for car alarms before they must auto-silence, penalties for repeated false alarms, and vehicle towing authority for chronic alarm violations.
Rules for portable and standby generators, including permitted operating hours, decibel limits, and restrictions during non-emergency use.
Noise limits for jackhammers, compressors, pile drivers, and other heavy construction equipment, including permitted hours and decibel thresholds at the property line.
Time-of-day restrictions on commercial delivery trucks operating in residential zones, including back-up beepers, refrigeration units, and engine idling.
Voluntary altitude and route guidance for helicopters over residential neighborhoods (LA Helicopter Noise Initiative), and complaint reporting tools.
Operating restrictions and noise-mitigation requirements for medical-center helipads, including emergency-flight exemptions and routine-flight curfews.
Limits on aircraft engine maintenance run-ups at LAX, Van Nuys, and Bob Hope airports, including run-up enclosure requirements and time-of-day rules.
Special bass-frequency (≤125 Hz) sound limits for venues, including dB(C) measurement standards and how cities differentiate bass noise from baseline ambient.