CFR›Title 33›Chapter I›Part 149›Subpart F›Subject Group Noise Limits ContainsSection 149.697CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 149.697 § 149.697 What are the requirements for a noise level survey? Previous Miscellaneous Miscellaneous Next Personnel Landings Personnel Landings