3、 文献标志码:A 文章编号:1674–5124(2018)07–0030–05StudyonnonlinearsoundfieldmeasurementofultrasoundtreatmenttransducerJIANG Jian, ZHAO Peng, WANG Yuebing, ZHENG Huifeng(College of Metrology and Measurement Engineering, China Jiliang University
4、, Hangzhou 310018, China)Abstract: Aiming at the nonlinear phenomena of the ultrasound treatment transducer sound field, a nonlinearacoustic field measurement of ultrasound treatment transducer based on near-field measurement method iscarried out. The measurement
5、 system is set up. A single-probe hydrophone is used to conduct scanningmeasurement of the sound pressure on two closely spaced parallel planes within the measured position in thenonlinear sound field. In this way, the sound pressure data on two planes is obtaine
6、d. The sound intensity andthe sound power of the measured position are obtained by the cross spectrum operation of the two groups ofsound pressure data. The sound field of three positions is measured. The measurement data show that the soundpower consistency erro
7、r of the three positions is less than 5%, and the repeatability error of the same position isless than 2%. By comparing with the radiation force balance method, the relative errors of three positions areall calculated to be less than 5%. The results show that the
8、 near-field cross spectrum method is suitable fornonlinear sound field measurement. It can also obtain three acoustic parameters, including sound pressure,soun
