Amplified music rules in Cupertino, CA — also called sound permit, PA system, or live music ordinances — set decibel limits, time-of-day restrictions, and when permits are required.
Amplified sound is governed by the general property-line limits of CMC 10.48.040 (50 dBA night / 60 dBA day for residential) and the noise-disturbance ban in 10.48.060. Amplified public events need a city permit under CMC 10.48.052.
Cupertino Municipal Code has no separate "amplified music" section for private property; amplified sound is regulated through the general standards. Section 10.48.040 caps noise crossing a property line at 50 dBA nighttime and 60 dBA daytime from a residential origin, and Section 10.48.060 prohibits any unreasonable "noise disturbance" as defined in 10.48.010. Public-address systems, musical instruments, and electronic amplification at outdoor events on nonresidential property are regulated by Section 10.48.052 ("Outdoor Public Events"), which requires a city permit and caps the event at 70 dBA on any residential property (max three hours daytime), 60 dBA from 8:00-11:00 p.m., and 55 dBA other nighttime, with continuous peaks over 95 dBA prohibited where people are exposed.
Exceeding the amplified-sound limits or the general noise-disturbance rule of Chapter 10.48 is a misdemeanor punishable per CMC Chapter 1.12 (CMC 10.48.070). Permit conditions for outdoor events may impose stricter limits and override the code (CMC 10.48.052B).
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