The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
A. “A” BAND LEVEL. The total sound level of all noise as measured with a sound level meter using a-weighting network. The unit is the dB(A).
B. AMPLIFIED SOUND REPRODUCTION DEVICE. Any device, instrument, mechanism, equipment or apparatus for the amplification of any sounds from any radio, phonograph, stereo, electronic media player, musical instrument, television, loudspeaker or other sound making or sound producing device or any device or apparatus for the reproduction or amplification of the human voice or other sound.
C. “C” BAND LEVEL. The total sound level of all noises as measured with a sound level meter using c-weighted network. The unit is the dB(C).
E. DECIBEL (dB). A sound pressure that is 20 times the logarithm to the base ten of the ratio of the pressure of the sound measured to the reference pressure, two × 10 -5 Newton/meter 2.
F. EMERGENCY WORK. Any work performed to prevent or alleviate physical trauma or property damage threatened or caused by an emergency which has or may result in a disruption of service and which is necessary to restore property to a safe condition following a public calamity or work required to protect the health, safety or welfare of persons or property or work by private or public utilities when restoring utility service.
G. FREQUENCY OF A FUNCTION PERIODIC IN TIME. The reciprocal of the primitive period. The unit is the hertz and shall be specified.
H. IMPULSE NOISE. A noise of short duration, usually less than 1 second, with an abrupt onset and rapid decay.
I. MICROBAR. A unit of pressure commonly used in acoustics and is equal to 1 dyne per square centimeter.
J. MOTOR VEHICLE. A self-propelled vehicle. A.R.S. § 28-101(32).
K. PERIOD OF A PERIODIC QUANTITY. The smallest increment of time for which the function repeats itself.
L. PERIODIC QUANTITY. Oscillating quantity, the values of which recur for equal increments of time.
M. PURE TONE NOISE. Any noise which is distinctly audible as a single pitch (frequency) or set of pitches as determined by the enforcement officer.
N. SOUND LEVEL (NOISE LEVEL) IN DECIBELS (DB). The sound measured with the a-weighting and slow response by a sound level meter.
O. SOUND LEVEL METER. An instrument including a microphone, an amplifier, an output meter, and frequency weighting networks used to measure sound levels which satisfy the pertinent requirements in American National Standard Specifications for Sound Level Meters S1.4-1971 or the most recent revision thereof.
(Ord. 21-1251, passed 2-23-2021; Ord. 09-965, passed 3-24-2009)