Keywords:
Acoustic measurement, Aerodynamics, Airborne noise, Control valves, Correcting units, Definitions, Dimensioning, Direction-control valves, Electrical engineering, Emission, Flow capacity, Flow rates, Fluid engineering, Gas flow, Laboratories, Laboratory testing, Laboratory tests, Measurement, Measurement of airborne noise, Measuring techniques, Noise, Noise emissions, Noise measurement, Pipelines, Process control, Process measuring and control technology, Ratings, Sound, Sound level, Sound pressure level, Sound propagation, Testing, Valves