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