How is noise pollution controlled?
EPA has a role in protecting the community from noise. EPA generally deals with noise from larger industries and entertainment, and has a role in developing policies and objectives for use by other agencies. These agencies are local government, police and transport agencies. If a measurement of noise emission is required a sound level meter is used. A measure of the level of sound is called the decibel. The zero of the decibel scale is the hearing threshold. Sounds at 010 decibels are so quiet that they are almost impossible to hear, while at the top end of the scale, at around 150 decibels, it can damage your eardrums.
