Section 484D.160 - Noise emission tests: Personnel; instrumentation1. Persons selected to conduct noise measurement testing or to measure noise level of vehicles operated on a highway shall have been trained and qualified in the techniques of sound measurement and the operation of sound measuring instruments.2. Equipment used in making vehicle noise measurements must meet the following requirements: (a) The sound level meter must meet the requirements of ANSI Standard S 1.4 -1971, except that the B and C weighting networks and the slow-acting indicator need not be incorporated in the instrument.(b) The sound level calibrator must be an auxiliary acoustical calibrator of the coupler type specified in ANSI Standards S 1.4 -1971.(c) Any windscreen or nose cone used with the sound level meter must be calibrated in accordance with instructions of the manufacturer of the microphone or sound level meter.(d) A tachometer must be used to determine when maximum engine speed is attained in conducting the tests specified for in NAC 484D.155.Nev. Admin. Code § 484D.160
[Dep't of Motor Veh., Noise Emissions Reg. §§ IV & V, eff. 1-21-72] - (Substituted in revision for NAC 484.160)