3Schmitz,Steve steven.Reducing pump noise in cooling tower applications[J].World Pumps,2004(9):24-29.
4M A Langthjem,NOlhoff.Anumericalstudyof flow-induced noise in atwodimensional centrifugal pump[J].Part II.Hydroacoustics.Journal of Fluids and Structures,2004(19):369-386.