Fullerton, CA Noise from Specific Sources: Low-Frequency Bass Limits (2026)
Key Facts
- Standard used
- Plainly audible test, not a dB number
- Where it applies
- Mixed commercial/residential use areas
- Trigger
- Audible inside building, doors/windows closed
- Who must act
- Owner, tenant, or operator of source
- Remedy required
- Reduce volume or add acoustic mitigation
- Enforcement
- Code Enforcement Division, FMC § 15.90.070
- Appeal window
- 15 days to City Council
Summary
In areas that mix commercial and residential uses, Fullerton judges speaker and sound-system noise, the kind carried by bass-heavy music, by whether it is plainly audible inside a neighboring building with the doors and windows shut, not by a decibel meter reading. FMC § 15.90.030(B)(3) treats such sound as ambient until city staff confirms it crosses that line.
(3) Noise generated by audio speakers or sound systems in areas with a mix of commercial and residential uses is generally considered part of the ambient noise environment. However, such noise shall not be plainly audible within adjacent commercial or residential buildings when doors and windows are closed. If city staff determines, based on observation or measurement, that such noise is plainly audible under these conditions, the property owner, tenant, or operator responsible for the noise source shall reduce the volume or implement reasonable acoustic mitigation measures to prevent the noise from exceeding this standard.
Full Breakdown
030(B)(2). Rather than a decibel ceiling, the section applies a plainly-audible test: noise from audio speakers or sound systems is presumed to be ordinary ambient noise unless it can be heard inside an adjacent commercial or residential building with its doors and windows closed. Low-frequency bass, which travels through walls more readily than higher frequencies, is the noise the section is written to reach even where a handheld meter reading might not clear a numeric threshold. 030(B)(3) puts the burden on the property owner, tenant, or operator responsible for the source to turn the volume down or add acoustic mitigation such as sound baffling or equipment relocation. 050. 080.
Violations & Fines
An operator who does not reduce volume or add mitigation after city staff confirms the plainly-audible standard is being exceeded is subject to FMC § 1.08.010 penalties: an infraction fine of up to $100 for a first violation, $200 for a second within a year, and $500 for each further violation, or misdemeanor prosecution carrying up to $1,000 and six months in county jail. Citations may be appealed to the City Council within 15 days under § 15.90.080.
Frequently Asked Questions
Does Fullerton use a decibel limit for bass from speakers?
What must a business do if its bass is ruled plainly audible?
Who enforces the plainly audible speaker standard in Fullerton?
Sources & Official References
Other rules in Fullerton
California rules heatmap·Compare Fullerton to another location·View the California noise from specific sources overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.