[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR325.71]

[Page 799]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 325_COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS
--Table of Contents
 
                      Subpart F_Correction Factors
 
Sec. 325.71  Scope of the rules in this subpart.


    (a) The rules in this subpart specify correction factors which are 
added to, or subtracted from, the reading of the sound level generated 
by a motor vehicle, as displayed on a sound level measurement system, 
during the measurement of the motor vehicle's sound level emissions at a 
test site which is not a standard site.
    (b) The purpose of adding or subtracting a correction factor is to 
equate the sound level reading actually generated by the motor vehicle 
to the sound level reading it would have generated if the measurement 
had been made at a standard test site.