LAMC §111.03 sets dB(C) bass limits at the property line in addition to dB(A) ambient thresholds, targeting subwoofer and amplified sub-bass below 125 Hz. Exceeding either A-weighted or C-weighted limit qualifies as a noise violation.
LAMC §111.03 establishes presumed noise limits using both A-weighted decibels (dB(A)) for general ambient sound and C-weighted decibels (dB(C)) for low-frequency content. C-weighting captures bass below 125 Hz that A-weighting filters out, so subwoofers, club PA systems, and home theaters can trigger violations even when overall dB(A) appears compliant. Measurement occurs at the receiving property line. LAMC §111.01 defines disturbing noise standards. The LAPD Noise Enforcement Team and LASAN investigators use Type 2 sound level meters with C-weighting capability for after-hours bass complaints. Repeat amplified-music violations escalate to misdemeanor charges.
Administrative citation $250 first offense, $500 repeat per LAMC §11.00(m); fourth violation in twelve months may be charged as misdemeanor punishable by fine up to $1,000 or six months jail.
Los Angeles, CA
Amplified sound audible beyond 150 feet of the property line in a residential zone or within 500 feet of one is a violation under LAMC 112.01. Sound exceedin...
Los Angeles, CA
Los Angeles regulates bar and nightclub noise under LAMC Section 116.01 (loud, unnecessary, and unusual noise) and LAMC 115.02 (amplified sound). The LAPD No...
Los Angeles, CA
Los Angeles Municipal Code Chapter XI prohibits unnecessary, excessive noise. Quiet hours run 10 PM–7 AM. Noise must not exceed ambient levels by more than 5...
See how Los Angeles's low-frequency bass limits rules stack up against other locations.
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