Low-Frequency Bass Limits: San Jose vs Sunnyvale
How do low-frequency bass limits rules compare between San Jose, CA and Sunnyvale, CA?
San Jose and Sunnyvale have similar restriction levels.
San Jose, CA
Santa Clara County
SJMC Chapter 20.100 lets Code Enforcement measure low-frequency bass on the C-weighted decibel scale and apply a 5 dB penalty when dB(C) minus dB(A) exceeds 10. Bass complaints from clubs, car audio, and home theaters can be cited even when A-weighted readings appear within limits.
View full San Jose rules →Sunnyvale, CA
Santa Clara County
Santa Clara County Title B noise standards measure complaints in dBA, which underweights low-frequency bass. Code enforcement may use dBC slow-response measurements when bass complaints persist, especially from car stereos, nightclub subwoofers, and residential parties.
View full Sunnyvale rules →Key Facts Comparison
| Fact | San Jose | Sunnyvale |
|---|---|---|
| Code chapter | SJMC Chapter 20.100 | - |
| Bass penalty trigger | dB(C) minus dB(A) over 10 | - |
| Penalty added | 5 dB to measured dB(A) | - |
| Meter standard | ANSI S1.4 Type 1 or 2 | - |
| First-offense fine | $250 administrative | - |
| Default weighting | - | A-weighted (dBA) |
| Bass weighting | - | C-weighted (dBC) on complaint |
| Residential dBC night | - | Approx 60 dBC |
| Vehicle stereo law | - | CVC §27007 (50-foot rule) |
| Indoor audibility | - | Nuisance under Title A |
Highlighted rows indicate differences between cities.
San Jose FAQ
Why does my neighbor's bass sound louder than the meter shows?
Standard A-weighting filters out low frequencies the human ear hears as thump and feel. San Jose Code Enforcement can switch to C-weighting and apply a 5 dB penalty when bass dominates, capturing the impact even when dB(A) readings look normal.
Can I get a San Jose nightclub cited for bass alone?
Yes. Code Enforcement and SJPD can cite under SJMC 20.100 with the bass penalty when C-weighted readings exceed A-weighted by more than 10 dB at your property line. Repeat citations support conditional use permit revocation review by Planning.
Sunnyvale FAQ
Why does my neighbor pass a sound test but I still hear bass?
Standard dBA measurements underweight bass frequencies. Request dBC measurements from code enforcement. Sustained low-frequency intrusion audible inside your home may also be cited as nuisance regardless of dBA reading.
Can SCC fine a club for bass leakage?
Yes. Persistent low-frequency complaints can trigger conditional use permit review, sound-wall mitigation requirements, and even permit revocation. File written complaints with code enforcement and document times and recordings.
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