For the purposes of this chapter, the words and phrases herein shall be defined as follows:
"A" BAND LEVEL: The total sound level of all noise as measured with a sound level meter using the "A" weighting network. The unit is the dBA.
AMBIENT NOISE: The all encompassing noise associated with a given environment, usually being a composite of sounds with many sources from various distances.
BAND PRESSURE LEVEL: "Band pressure level" of a sound for a specified frequency band shall mean the sound pressure level for the sound contained within the restricted band.
CYCLE: The complete sequence of values of a periodic quantity which occurs during a period.
DECIBEL (dB): A unit of level which denotes the ratio between two (2) quantities which are proportional to power; the number of decibels corresponding to the ratio of two (2) amounts of power is ten (10) times the logarithm to the base-10 of this ratio.
EMERGENCY WORK: Work made necessary to restore property to a safe condition following a public calamity or work required to protect persons or property from an imminent exposure to danger to the health and safety of the persons or property.
FREQUENCY: "Frequency" of a function periodic in time shall mean the reciprocal of the primitive period. The unit is the cycle per unit time and shall be specified.
MICROBAR: A unit of pressure commonly used in acoustics and is equal to one dyne per square centimeter.
MOTOR VEHICLES: Shall include, but not be limited to, minibikes and go-carts.
SOUND AMPLIFYING EQUIPMENT: Any machine or device for the amplification of the human voice, music, or any other sound, or by which the human voice, music, or any other sound is amplified. "Sound amplifying equipment" shall not include warning devices on authorized emergency vehicles or horns or other warning devices on any vehicle used only for traffic safety purposes.
SOUND LEVEL METER: An instrument, including a microphone, an amplifier, an output meter, and frequency weighting networks, for the measurement of noise and sound levels in a specified manner.
SOUND PRESSURE LEVEL: "Sound pressure level" in decibels of a sound shall mean twenty (20) times the logarithm to the base-10 of the ratio of the pressure of this sound to the reference pressure, which reference pressure shall be explicitly stated. (Ord. 11-O-2613, eff. 10-31-2011)