A. 
In the absence of objective measurement by use of a sound level, meter, additionally it is unlawful for any person to make, continue, or cause to be made or continued, within the limits of the city any disturbing, excessive or offensive noise which causes discomfort or annoyance to reasonable persons of normal sensitivity residing in the area.
B. 
The characteristics and conditions which should be considered in determining whether a violation of the provisions of this section and Section 9.24.170 exists, include, but are not limited to, the following:
1. 
The level of the noise;
2. 
Whether the nature of the noise is usual or unusual;
3. 
Whether the origin of the noise is natural or unnatural;
4. 
The level of the background noise;
5. 
The proximity of the noise to sleeping facilities;
6. 
The nature and zoning of the area within which the noise emanates;
7. 
The density of the inhabitation of the area within which the noise emanates;
8. 
The time of day or night the noise occurs;
9. 
The duration of the noise;
10. 
Whether the noise is recurrent, intermittent, or constant; and
11. 
Whether the noise is produced by a commercial or noncommercial activity.
(Prior code § 36.414(a))
The following acts, among others, are declared to be disturbing, excessive and offensive noises in violation of this section and Section 9.24.160, but said enumeration shall not be deemed to be exclusive, namely:
A. 
Horns, Signaling Devices, etc. Violations for disturbing, excessive or offensive noises associated with the use or operation of horns, signaling devices, etc., on automobiles, motorcycles, or any other vehicle, except as provided in Section 9.24.140, shall be prosecuted under applicable provisions of the California Vehicle Code.
B. 
Radios, Television Sets, Phonographs, and Similar Devices.
1. 
Uses Restricted. The use, operation, or permitting to be played, used or operated, any radio receiving set, musical instrument, phonograph, television set, or other machine or device for the producing or reproducing of sound in such manner as to disturb the peace, quiet and comfort of neighboring residents or persons of normal sensitivity residing in the area are declared to be disturbing, excessive or offensive noises.
2. 
Prima Facie Violations. The operation of any such set, instrument, phonograph, television set, machine or similar device between the hours of ten p.m. and eight a.m. in such a manner as to be plainly audible at a distance of fifty feet from the building, structure or vehicle in which it is located, shall be prima facie evidence of a violation of this section and Section 9.24.160.
C. 
Loudspeaking Amplifiers for Advertising. The use, operation, or the permitting to be played, used or operated of any sound production or reproduction device or machine, including, but not limited to, radio receiving sets, phonographs, musical instruments, loudspeakers, and sound amplifiers, for commercial or business advertising purposes in, upon, over, or across any street, alley, sidewalk, park or public property in such a manner as to violate the provisions of this chapter is prohibited. This provision shall not be applicable to sound amplifying equipment mounted on any sound truck or vehicle for commercial or noncommercial purposes where the owner or operator complies with the following requirements:
1. 
The only sounds permitted are music or human speech.
2. 
Operations are permitted between the hours of eight a.m. and nine p.m., or after nine p.m. during public events and affairs of interest to the general public.
3. 
Sound amplifying equipment shall not be operated unless the sound truck upon which such equipment is mounted is operated at a speed of at least ten miles per hour, except when said truck is stopped by traffic the sound amplifying equipment shall not be operated for longer than one minute at each stop.
4. 
Sound shall not be issued within one hundred yards of hospitals, schools, churches, or courthouses.
5. 
The human speech and music amplified shall not be profane, lewd, indecent or slanderous.
6. 
The volume of sound shall be controlled so that said volume is not raucous, jarring, disturbing or a nuisance to persons within the area of audibility and so that the volume of sound shall not exceed a sound level of sixty-five decibels (on the A scale) at a distance of fifty feet from the sound amplifying equipment as measured by a sound level meter which meets the American National Standard ANSI S1.4-1971, or the latest revision thereof.
7. 
No sound amplifying equipment shall be operated unless the axis of the center of any sound reproducing equipment used is parallel to the direction of travel of the sound truck; provided, however, that any sound reproducing equipment may be so placed upon said sound truck as to not vary more than fifteen degrees from either side of the axis of the center of the direction of travel.
8. 
No sound truck with its amplifying device in operation shall be driven on the same street past the same point more than twice in a period of one hour.
D. 
Yelling, Shouting, etc. Disturbing or raucous yelling, shouting, hooting, whistling or singing on the public streets, particularly between the hours of ten p.m. and eight a.m., or at any time or place so as to annoy or disturb the quiet, comfort or repose of neighboring residents or persons of normal sensitivity within the area for whatever reason, is prohibited.
E. 
Hawkers and Peddlers. The shouting or crying out of any peddlers, hawkers and vendors which disturbs the peace and quiet of a neighborhood or persons of normal sensitivity is prohibited. This provision shall not be construed to prohibit the selling by outcry of merchandise, food and beverages at sporting events, parades, fairs, celebrations, festivals, circuses, carnivals and other similar special events for public entertainment.
F. 
Drums, Other Instruments. The use of any drum or other instrument or device of any kind for the purpose of attracting attention by the creation of noise within the city is prohibited. This provision shall not apply to any person who is a participant in a school band or legally authorized parade or who has been otherwise duly authorized by the county to engage in such conduct.
G. 
Animals and Fowl. The keeping or maintenance, or the permitting to be kept or maintained, upon any premises owned, occupied or controlled by any person of any animal or fowl which, by any frequent or long continued noise, causes annoyance or discomfort to persons of normal sensitivity in the vicinity is prohibited; provided, however, that nothing contained in this subsection shall be construed to apply to occasional noises emanating from legally operated dog and cat hospitals, humane societies, pounds, farm and/or agricultural facilities, or areas where keeping of animals or fowl is permitted. The written affirmation by two persons having separate residences that a violation of this section disturbs the peace and quiet of said persons shall be a prima facie evidence of a violation of this section and Section 9.24.160.
H. 
Schools, Courts, Churches, Hospitals. The creation of any noise on any street, sidewalk or public place adjacent to any school, institution of learning (except recreational areas of schools), church, court or library, while the same are in use; or adjacent to a hospital, rest home, or long-term medical or mental care facility, which noise interferes with the workings of such institution or which disturbs or annoys patients in the hospital, rest home, or long-term medical or mental care facility; provided, conspicuous signs are displayed in such streets, sidewalks or public places indicating the presence of a school, institution of learning, church, court, library, rest home or long-term medical or mental care facility, is prohibited.
I. 
Steam Whistles. The operation, use, or causing to be operated or used, any steam whistle attached to any stationary boiler is prohibited, except to give notice of the time to start or stop work or as a sound signal of imminent danger.
J. 
Engines and Motor Vehicles. Any disturbing or raucous noises caused off streets or highways by racing or accelerating the engine of any motor vehicle while moving or not moving, by the wilful backfiring of any engine and exhaust from the engine tailpipe or muffler, or from the screeching of tires, is prohibited.
(Prior code § 36.414(b))
A. 
Any building burglar alarm must have an automatic cutoff, capable of terminating its operation within thirty minutes of the time it is activated, unless such an alarm is located within an agricultural or estate zone. Notwithstanding the requirements of this provision, any member of the sheriff's department shall have the right to take such steps as may be reasonable and necessary to disconnect any such alarm during the period of its activation.
B. 
No owner of a motor vehicle shall have in operation an audible burglar alarm therein, unless such burglar alarm is capable of terminating its operation within fifteen minutes of the time it is activated. Notwithstanding the requirements of this provision, any member of the sheriff's department shall have the right to take such steps as may be reasonable and necessary to disconnect any such alarm installed on a motor vehicle at any time during the period of its activation.
C. 
Any motor vehicle upon which a burglar alarm has been installed shall, when parked on a public highway or parking lot open to the public, prominently display the telephone number at which communication may be made with the owner of such motor vehicle.
(Prior code § 36.415)