San Clemente, CA Noise from Specific Sources: Low-Frequency Bass Limits (2026)

020 defines 'C-weighting' as a frequency response adjustment applied to a measured sound pressure level specifically to assess low frequency noise, such as that produced by drums or bass guitars, distinguishing it from the standard 'A-weighting' used for typical noise measurements and applied automatically on a sound level meter's C-scale setting. 060, are expressed in A-weighted decibels, dB(A), which can under-represent the low-frequency thump of bass-heavy music or subwoofers that pass through walls even when the overall A-weighted level looks compliant. 030 governs how any measurement, including a C-weighted one, must be taken: with a sound level meter calibrated before use, at a location on the affected property including decks and balconies, with the microphone five feet above ground level and kept clear of reflective surfaces near a property line.

, A-weighting or C-weighting) required by this chapter,' so an inspector investigating a persistent bass complaint can document both the offending noise and the ambient background on the C-scale to make the case that low-frequency sound, not just overall volume, is the disturbance.