In City of Renton in Ward v. Rock Against Racism, 491 U.S. 781, 105 L. Ed. 2d 661, 109 S. Ct. 2746 (1989), an association "dedicated to the espousal and promotion of antiracist views," challenged the constitutionality of a city's volume-control guidelines. Those guidelines required all performers to use the city's sound equipment and sound technician for performances at a particular park bandshell. The Court noted that the principal justification for the guidelines was the city's desire to control noise levels and to avoid undue intrusion into residential areas and other areas of the park. Id. at 792