Definitions. For the purpose of this section, the following definitions shall apply:
A-WEIGHTED SOUND LEVELThe sound pressure level measured with a meter using an "A-weighted" frequency response as prescribed by the American National Standards Institute (ANSI), or its successor. A-weighting is used to approximate the average human ear's response to a range of sound frequencies.
AMBIENT NOISEThe background average noise level within an area, exclusive of any extraneous sounds.
CLASS A (RESIDENTIAL)Lands residentially zoned and used primarily for sleeping purposes by people. Such lands shall include those contained in the R-1 and R-AG Zoning Districts.
CLASS B (COMMERCIAL) LANDLands where people likely to communicate with one another by speech. Class B shall include public lands and zoning districts designated as C-1.
CLASS C (INDUSTRIAL) LANDLands intended primarily for heavy commercial or industrial use, and shall include those lands in zoning district M-1.
dBAThe abbreviation for A-weighted sound level in decibels.
FAST RESPONSEThe characteristic of a sound level meter which allows for accurate measurement of impulsive sounds such as horn blasts, explosive sounds, discharges or passing vehicles.
IMPULSIVE SOUNDA sound characterized by excursions of the sound pressure which exceed the ambient sound by six or more decibels but last two seconds or less.
INDUSTRIAL OPERATIONThe production, fabrication and storage of man-made goods and the production, transformation and storage of energy in all forms.
MAXIMUM SOUND LEVELThe recorded or noted maximum RMS (room-mean-square) sound pressure level noted using an instrument which meets the requirements of this chapter. Maximum impulsive sound level shall be measured using the fast response setting. Maximum continuous sound level shall be measured using the slow response setting.
REAL PROPERTY BOUNDARYAn imaginary line exterior to any structure, along the ground surface, which separates the real property owned by one person from that owned by another person, and the vertical extension of such line.
RECEIVING LANDThe property line of the real property where the sound is being heard, and where appropriate level restrictions apply. In the case of any apartment, Townhouse or condominium, the point of measurement is within the affected unit.
SOUND LEVELThe quantity, in decibels, measured using an instrument satisfying the requirements of ANSI S1.4-1983. Sound level is the frequency-weighted (see "A-weighting") sound pressure level obtained with "fast" or "slow" response.
SOUND LEVEL METERAn instrument designed to detect and measure sound pressure levels and display this information in decibels, in an analog or digital form. An instrument meeting the requirements of this code shall conform to the requirements of ANSI S1.4-1983, Type 1 or Type 2.