Natural sounds include the sound of flowing water, bird songs and other audible wildlife activities, and the sound of the wind through the trees. According to a recent survey, nearly as many visitors come to the national park system to enjoy the natural sounds as come to enjoy the scenery. Undesirable human-caused sound noise affects the ability to enjoy natural sounds. This could include excessively loud talking in a campground or the sound of an approaching motor vehicle when trying to view wildlife. Determining when, where, and how much noise is appropriate is the challenge.
General guidance is provided in the statement.
This order was not posted to the NPS web site reference desk at the time of this writing, but will likely be soon.