Code of Federal Regulations Title 43. Public Lands:  Interior § 43.8365.2–2 Audio devices

(a) Operate or use any audio device such as a radio, television, musical instrument, or other noise producing device or motorized equipment in a manner that makes unreasonable noise that disturbs other visitors;

(b) Operate or use a public address system;

(c) Construct, erect or use an antenna or aerial for radiotelephone, radio or television equipment, other than on a vehicle or as an integral part of such equipment.