Cal. Code Regs. Tit. 13, § 1021 - Definitions
(a) A "siren" is an
audible warning device that produces the readily recognizable warning sound
identified with emergency vehicles. An audible device, such as a vehicle theft
alarm, that produces a sound with one or more of the following characteristics
is not a siren:
(1) an unvarying
sound.
(2) a varying sound that
cycles at a rate faster than 400 cycles per minute.
(3) a discontinuous sound that repeats at
rates lower than 90 cycles per minute or higher than 400 cycles per
minute.
(4) a sound frequency (and
any second harmonics) lower than 100 Hz or higher than 5,000
Hz.
(b) An "authorized
emergency vehicle siren" is a device that meets the requirements of this
article.
(c) An "electromechanical
siren" consists of a stator and rotor driven by an electric motor.
(d) An "electronic siren" consists of an
oscillator, amplifier, and speaker.
(e) A "mechanical siren" consists of a stator
and rotor driven by a mechanical connection to a moving part of the vehicle or
engine.
(f) "Manual" means a siren
control that allows the operator to produce a wailing sound by alternately
applying and releasing a momentary contact switch.
(g) "Wail" is a siren sound producing a slow,
continuous automatic cycling of increasing and decreasing frequencies and sound
levels.
(h) "Yelp" is a siren sound
producing a rapid, continuous automatic cycling of increasing and decreasing
frequencies and sound levels.
(i)
"Hi-Lo" means a nonsiren sound alternating between a fixed high and a fixed low
frequency.
(j) "ANS" means a
standard adopted by the American National Standards Institute, Inc., 1430
Broadway, New York, NY 10018.
(k)
"SAE" means a standard or recommended practice of the Society of Automotive
Engineers, 400 Commonwealth Drive, Warrendale, PA 15096.
Notes
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 26103, 26104 and 27002, Vehicle Code.
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.