Mission Viejo, CA Noise Ordinances: Amplified Music & Outdoor Sound (2026)

Sec. 010 defines amplified sound and/or sound-emanating equipment as music, sound wave, vibration, or speech projected or transmitted by electronic equipment, including amplifiers, horns, and megaphones. Sec. 030(d)(1) states the council's purpose is to protect the public's constitutional rights to privacy and freedom from the nuisance of loud, unnecessary sound while recognizing that some uses of sound equipment are protected free-speech activity. Sec. 030(d)(2) makes it unlawful to install, use, or operate a loudspeaker, horn, megaphone, or other sound amplifying or emanating equipment within a park to give instructions, talks, addresses, lectures, or transmit music, except when done by authorized law enforcement or under a reservation or permit issued by the council or director and operated per its terms.

Sec. 030(d)(3) directs the council or director to weigh the applicant's free speech and assembly rights, the effect on peaceable passage or presence of park users, the potential for disorder or unlawful injury, invasion of privacy, breach of the peace, and conflicts with other scheduled park uses when granting or denying a permit; the council or director cannot deny a permit merely because it dislikes or disagrees with the content of a proposed talk or musical presentation, though it may deny a permit for events designed to advocate imminent lawless conduct. Sec. 030(d)(4) limits amplifiers used in parks to power supplied or approved by the city, or battery power.