What is Noise pollution?

Noise pollution is a type of energy pollution in which distracting, irritating, or damaging sounds are freely audible. Noise pollution contaminants are not physical particles, but rather waves that interfere with naturally-occurring waves of a similar type in the same environment. 

Sounds are considered noise pollution if they adversely affect wildlife, human activity, or are capable of damaging physical structures on a regular, repeating basis. A sound may be considered noise pollution if it disturbs any natural process or causes human harm, even if the sound does not occur on a regular basis.