00989nam a22001337a 4500999001700000020001500017245019200032260005200224300001000276505023400286650024000520942000700760952008800767  c16233d16233  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  cST  00104070aAIISHbAIISHd2020-06-23l0pST020r2020-06-23 00:00:00w2020-06-23yST