Specific terms used in this chapter are defined below and shall be interpreted to be in accordance with RCW 70.107.020 and WAC 173-60-020, as now enacted or hereafter amended. In all cases of direct conflict, said statute and regulations shall control; and if not set forth there, terms shall be interpreted in conformance with the definitions set forth herein; and if not set forth there, terms shall be interpreted in conformance with definitions used by the American National Standards Institute (ANSI) or its successor body; and if not set forth there, terms shall be interpreted in conformance with their usual and ordinary meaning.
A-WEIGHTED SOUND LEVEL: | The sound pressure level in decibels measured using the "A"-weighted network on a sound level meter as specified by the American National Standards Institute specification for sound level meters as now existing or as hereafter amended or modified. The level so read is designated dBA. |
CONSTRUCTION: | Any site preparation (including blasting), grading, assembly, erection, demolition, substantial repair, alteration or similar action for or of public or private rights-of-way, structures, utilities or similar property. |
DAY OR DAYTIME: | The hours between seven o’clock (7:00) A.M. and ten o’clock (10:00) P.M. on weekdays, and between nine o’clock (9:00) A.M. and seven o’clock (7:00) P.M. on Saturdays, Sundays and legal holidays. "Legal holidays," for purposes of this Chapter shall be those set forth in RCW 1.16.050 as now enacted or hereafter amended. |
DECIBEL (dB): | A decibel is a unit for measuring the volume of sound. (dBA) is defined above under the heading "A-WEIGHTED SOUND LEVEL." |
EDNA (Environmental Designation for Noise Abatement): | An area or zone within which maximum permissible noise levels are established by the Washington State Department of Ecology and this code. |
EXISTING: | A process, event, or activity in an established area prior to September 1, 1975. |
IMPULSIVE SOUND: | Sound of short duration, usually less than one second, with an abrupt onset and rapid decay, with a peak value exceeding the ambient level by more than 10 dBA. |
LDN: | The day-night average sound level which is a 24-hour energy average of the A-weighted sound pressure level where 10 dBA is added to nighttime noise levels from 10:00 p.m. to 7:00 a.m. before averaging. |
LEQ: | The equivalent A-weighted sound level which is the constant sound level that, in a given situation and time period, conveys the same sound energy as the actual time-varying A-weighted sound. |
NIGHT OR NIGHTTIME: | Those hours not defined as "day or daytime" in this section. |
NOISE: | The intensity, duration and character of sounds from any and all sources. |
NOISE DISTURBANCE: | Any sound which annoys, disturbs, or perturbs reasonable persons with normal sensitivities; or any sound which unreasonably injures or endangers the comfort, repose, health, hearing, peace, or safety of persons or animals. |
PERSON RESPONSIBLE FOR THE VIOLATION: | Any individual, corporation, partnership, association, government body, state agency or other entity whatsoever, who is required by the applicable regulation to comply therewith, or who commits any act or omission which is a violation or causes or permits a violation to occur or remain upon property in the city, and includes but is not limited to owner(s), lessor(s), tenant(s), or other person(s) entitled to control, use and/or occupy property where a violation occurs. |
PURE TONE COMPONENT: | Any sound which can be distinctly heard as a single pitch or a set of single pitches. A pure tone shall exist if the one-third octave band sound pressure level in the band with the tone exceeds the arithmetic average of the sound pressure levels of the two contiguous one-third octave bands by five decibels for center frequencies of 500 Hz and above, by eight decibels for center frequencies between 160 Hz and 400 Hz, and by 15 decibels for center frequencies less than or equal to 125 Hz. |
REAL PROPERTY: | An interest or aggregate of rights in land that is guaranteed and protected by law. For the purposes of this chapter, "real property" includes leasehold interests, including interests in a unit of a multiple unit structure, such as a condominium, apartment building, office building or other structures, regardless of whether the unit in question is a ground floor unit or not. For the purpose of this chapter, "ground floor" is synonymous with "first floor" and such term shall be given its usual and ordinary meaning. |
RECEIVING PROPERTY: | Real property within which sound originating from outside the property is received and within which unreasonably disturbing noise, as defined herein, or the maximum permissible noise levels specified herein, shall not be exceeded from sources outside such property. |
SOUND AMPLIFICATION EQUIPMENT: | Any machine or device for the amplification of the human voice, music or any other noise or sound. |
SOUND LEVEL: | A weighted sound pressure level measured by the use of a sound level meter using an A-weighted network and reported as decibels, dBA. |
SOUND LEVEL METER: | A device which measures sound pressure levels and conforms to Type 1 or Type 2, as specified in the American National Standards Institute Specification Section 1.4 (1971) as now exists or as hereafter amended or modified. |
WARNING DEVICE: | Any device intended to provide public warning of potentially hazardous, emergency or illegal activities, including but not limited to a burglar alarm or vehicle backup signal. |
WEEKDAY: | Any day, Monday through Friday, for purposes of this Chapter, that is not a "legal holiday" as defined in RCW 1.16.050 as now enacted or hereafter amended. |
WEEKEND: | Saturday, Sunday and any "legal holiday" as defined in RCW 1.16.050. |
(Ord. 655, 8-25-2003; Ord. 895, 8-26-2013)