Section 3-101 - Definitions(a) In this title the following words have the meanings indicated.(b) "Environmental noise standard" means a goal for the limitation of noise, from all sources, that exists in a defined area under specified conditions.(c)(1) "Noise" means the intensity, frequency, duration, and character of sound.(2) "Noise" includes sound and vibration of subaudible frequencies.(d) "Political subdivision" means a county or municipal corporation of this State.(e) "Sound level limit" means the maximum allowable noise emission from a noise source in a defined area under specified conditions.(f) "Source" means any person or property from which sound originates.