For the purposes of this chapter, the following terms are defined as follows:
means an essential activity necessary to restore, preserve, protect or save lives or property from imminent danger of loss or harm or to restore essential services.
means those days set forth in Section 13.04.100 of this code.
means any portable machine used to blow leaves, dirt and other debris off sidewalks, driveways, lawns or other surfaces.
means the lowest sound level repeating itself during a 15 minute period as measured with a precision sound level meter, using slow response and "A" weighting. The minimum sound level shall be determined with the noise source at issue silent, and in the same location as the measurement of the noise level of the source or sources at issue. If a significant portion of the local ambient is produced by one or more individual identifiable sources which would otherwise be operating continuously during the 15 minute measurement period and contributing significantly to the ambient sound level, determination of the local ambient shall be accomplished with these separate identifiable noise sources silent.
means the maximum continuous sound level or repetitive peak sound level, produced by a source or group of sources as measured with a precision sound level meter. In order to measure a noise level, the controls of the precision sound level meter should be arranged to the setting appropriate to the type of noise being measured.
means a device for measuring sound level in decibel units within the performance specifications in the American National Standards Institute Standard S1.4, "Specification for Sound Level Meters."
means a district that is zoned R-1, R-2, R-3, or R-4 pursuant to Title 25, but does not include a district that is zoned C-R.
means a logarithmic indication of the ratio between the acoustic energy present at a given location and the lowest amount of acoustic energy audible to sensitive human ears and weighted by frequency to account for characteristics of human hearing, as given in the American National Standards Institute Standard S1.1, "Acoustic Terminology," paragraph 2.9, or successor reference. All references to dB in this chapter utilize the A-level weighting scale, abbreviated dBA, measured as set forth in this section.
(Ord. 1681 § 2, (2002))