In Grayned v. City of Rockford, the Supreme Court ruled that a city’s
anti-picketing ordinance was over broad, but their anti-noise ordinance was
constitutional.
Saia v. New York (1948) invalidated a sound truck ordinance that allowed
the police chief to act as a censor on speech for violating the First
Amendment.
Ward v. Rock against Racism (1989) ruled that cities could control the
volume of amplified music at rock concerts without violating the First
Amendment.
