40 CFR § 201.21 Noise Emission Standards for Transportation Equipment; Interstate Rail Carriers

§ 201.21 Quantities measured.

Current through Aug 22, 2025 · Read all of Part 201

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.

← § 201.20 Applicability and purpose.§ 201.22 Measurement instrumentation. →