All terminology used in this section not defined below shall be in conformance with applicable publications of the American National Standards Institute (ANSI) or its successor body.
A-WEIGHTED SOUND LEVEL. The sound pressure level in decibels as measured on a sound level meter using the A-frequency-weighted network and slow meter response setting. The level so read is designated dB.
DECIBEL (dB). A unit for describing the amplitude of sound, equal to twenty (20) times the base of the logarithm to the base of the ratio for the pressure of the sound measured to the reference pressure, which is twenty (20) micronewtons per square meter.
EMERGENCY WORK. Any work performed for the purposes of maintaining public safety, preventing or alleviating physical trauma or property damage threatened or caused by an existing or imminent peril.
OUTDOOR AMPLIFIED SOUND. Any sound using amplifying equipment whose sound is outside or whose source is inside and the sound propagates to outside through the structure.
PLAINLY AUDIBLE. Able to be detected by a person using his or her unaided hearing faculties. As an example, if the sound source under investigation is a portable or personal vehicular sound amplification or reproduction device, the detection of the rhythmic bass component of the music is sufficient to verify plainly audible sound. The officer need not determine the title, specific words, or the artist performing the song.
SOUND-AMPLIFYING EQUIPMENT. Any device for the amplification of the human voice, music, or any other sound, including, but not limited to, jukeboxes, stereos, and radios.
SOUND LEVEL. The weighted sound pressure level obtained by the use of a sound level meter and frequency weighted network, such as A, B, or C as specified ANSI S1.4-1971. If the frequency weighting employed is not indicated, the A-weighting shall apply.
SOUND LEVEL METER. Device used to measure sound pressure levels with a standardized frequency weighting and indicated exponential time weighting for measurements of sound level, or without time weighting for measurement of time-average sound pressure level or sound exposure level. The sound level meter must be of standard design and quality having characteristics established by ANSI.
SOUND PRESSURE LEVEL. Twenty times the logarithm to the base ten of the ratio of the RMS sound of twenty (20) micronewtons per square meter.
(1989 Code, § 11-4.2) (Ord. 02-01, passed 4-8-2002; Ord. 17-O-03, passed 11-27-2017)