{"data":{"id":"us/49-cfr-325.27","jurisdiction":"us","citation":"49 CFR 325.27","heading":"Use of a windscreen.","body":"A properly installed windscreen, of the type recommended by the manufacturer of the Sound Level Measurement System, shall be used during the time that noise emission measurements are being taken.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER III—FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER A—GENERAL REGULATIONS","PART 325—COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS","Subpart C—Instrumentation"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"aa262619e9eea35faf7bab613064e65377b509bc1d2aca26965d118e14be62cb","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-325.25","next":"us/49-cfr-325.31"},"notice":"GroundRules: Original legal text. Not legal advice."}