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Title 40: Protection of Environment
CHAPTER I: ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
SUBCHAPTER G: NOISE ABATEMENT PROGRAMS
PART 201: NOISE EMISSION STANDARDS FOR TRANSPORTATION EQUIPMENT; INTERSTATE RAIL CARRIERS
Subpart C: Measurement Criteria
201.21 - Quantities measured.
The quantities to be measured under the test conditions described below, are the A-weighted sound levels for ?fast? or ?slow? meter response as defined in the American National Standard S1.4-1971.
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