The creation of any excessive noise on any street adjacent to any school, institution of learning, church or court, while the same is in use; or, adjacent to any hospital; which unreasonably interferes with the working of such institution, or which disturbs or unduly annoys patients in the hospital, provided conspicuous signs are displayed in such streets indicating that the same is a school, hospital or court street, is hereby declared unlawful.

(Code 1964, § 7.315)