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US law
Federal (United States)
Regulations
Title 49 CFR — Transportation
Chapter III — FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
Part 325 — COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS
Subpart C — Instrumentation
Federal (United States) · Regulations
Subpart C — Instrumentation
4 sections
4 sections
49 C.F.R. § 325.21
Scope of the rules in this subpart.
49 C.F.R. § 325.23
Type of measurement systems which may be used.
49 C.F.R. § 325.25
Calibration of measurement systems.
49 C.F.R. § 325.27
Use of a windscreen.