43 CFR 8365.2-2 - Audio devices.
On developed recreation sites or areas, unless otherwise authorized, no person shall:
(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.