LA County Code Title 12.08 measures low-frequency bass from sound systems on the C-weighted scale, capping levels at 60 dB(C) inside neighboring residences in unincorporated areas. LASD investigates throbbing-bass complaints from clubs, parties, and modified vehicles.
Low-frequency bass passes through walls and windows even when overall A-weighted decibel readings stay legal. LA County addresses this by allowing C-weighted measurements (dB(C)) under Title 12.08.350 for chronic complaints from amplified bass. Inspectors from County Code Enforcement or LASD acoustic-trained deputies measure inside the affected residence; readings above 60 dB(C) at night (10pm-7am) or 65 dB(C) daytime substantiate a violation. Common sources include nightclubs, backyard parties with subwoofers, modified-vehicle stereos, and home theaters near party walls. The county's commercial nightlife establishments must maintain bass attenuation as conditions of conditional-use permits, often with sound walls or bass traps required.
First-offense bass-noise violations are infractions with fines up to $250 under §12.08.530. Subsequent violations within twelve months become misdemeanors with fines up to $1,000 plus possible CUP revocation for commercial venues. Modified-vehicle bass also draws CVC §27007 citations.
Los Angeles County, CA
Bars and entertainment venues in unincorporated LA County must comply with Chapter 12.08 exterior noise standards. Commercial zone limits are 60 dBA daytime ...
Los Angeles County, CA
Amplified music and sound devices in unincorporated LA County are regulated under Chapter 12.08 (Noise Control). Residential areas: 45 dB nighttime (10 PM-7 ...
See how Los Angeles County's low-frequency bass limits rules stack up against other locations.
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