00841nam a22000977a 4500020001500000245019200015260005200207300001000259505023400269650024000503  a0580137805  aBS 5944-4:1984-Measurement of airborne noise from hydraulic fluid power systems and components Part 4 :bMethod of determining sound power levels from valves controlling flow and pressure  aLondon :bBritish Standards Institution,c1984.  a12 p.  aDescribes procedures for the determination of sound power levels of a hydraulic fluid power valve under controlled conditions of installation and operation, suitable for providing a basis for comparing the noise levels of valves.  aFlow regulators, Liquid valves, Cavitation, Free-field rooms, Hydraulically-operated devices, Hydraulic transmission systems, Sound intensity, Valves, Noise (environmental), Testing conditions, Acoustic measurement, Pressure regulators