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Part 325
FEDERAL · 49 CFR
Part 325 — Compliance with Interstate Motor Carrier Noise Emission Standards
28 sections · Title 49: Transportation
§ 325.1
Scope of the rules in this part.
§ 325.3
§ 325.3 [Reserved]
§ 325.5
Definitions.
§ 325.7
Allowable noise levels.
§ 325.9
Measurement tolerances.
§ 325.11
Issuance, amendment, and revocation of the rules in this part.
§ 325.13
Inspection and examination of motor vehicles.
§ 325.21
Scope of the rules in this subpart.
§ 325.23
Type of measurement systems which may be used.
§ 325.25
Calibration of measurement systems.
§ 325.27
Use of a windscreen.
§ 325.31
Scope of the rules in this subpart.
§ 325.33
Site characteristics; highway operations.
§ 325.35
Ambient conditions; highway operations.
§ 325.37
Location and operation of sound level measurement system; highway operations.
§ 325.39
Measurement procedure; highway operations.
§ 325.51
Scope of the rules in this subpart.
§ 325.53
Site characteristics; stationary test.
§ 325.55
Ambient conditions; stationary test.
§ 325.57
Location and operation of sound level measurement systems; stationary test.
§ 325.59
Measurement procedure; stationary test.
§ 325.71
Scope of the rules in this subpart.
§ 325.73
Microphone distance correction factors.
§ 325.75
Ground surface correction factors.
§ 325.77
Computation of open site requirements—nonstandard sites.
§ 325.79
Application of correction factors.
§ 325.91
Exhaust systems.
§ 325.93
Tires.