Airport Engine Run-up
Noise from Specific Sources
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.
Other Noise from Specific Sources Topics
HVAC & Mechanical Noise
Noise limits for air conditioners, heat pumps, pool equipment, and other mechanical systems, including decibel thresholds measured at the property line.
Bar & Nightclub Noise
Noise regulations specific to bars, nightclubs, and entertainment venues, including bass frequency limits, soundproofing requirements, and complaint procedures.
Car Alarm Limits
Maximum duration for car alarms before they must auto-silence, penalties for repeated false alarms, and vehicle towing authority for chronic alarm violations.
Generator Noise
Rules for portable and standby generators, including permitted operating hours, decibel limits, and restrictions during non-emergency use.
Delivery Truck Noise
Time-of-day restrictions on commercial delivery trucks operating in residential zones, including back-up beepers, refrigeration units, and engine idling.
Helicopter Flight Paths
Voluntary altitude and route guidance for helicopters over residential neighborhoods (LA Helicopter Noise Initiative), and complaint reporting tools.
Hospital Helipad Noise
Operating restrictions and noise-mitigation requirements for medical-center helipads, including emergency-flight exemptions and routine-flight curfews.
Low-Frequency Bass Limits
Special bass-frequency (≤125 Hz) sound limits for venues, including dB(C) measurement standards and how cities differentiate bass noise from baseline ambient.