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An approach to design and fabrication of resonant giant magnetostrictive transducer
Mohammad R. Sheykholeslami,Yousef Hojjat,M. Karafi,Simone Cinquemani,Mojtaba Ghodsi 국제구조공학회 2016 Smart Structures and Systems, An International Jou Vol.17 No.2
The paper provides a comprehensive procedure for the mechanical and magnetic design of Langevin transducer based on giant magnetostrictive material. The the transducer is designed to work at its second mode of vibration, having high mechanical quality factor and low damping coefficient. The design procedure is based on an analytical model and it is verified by finite-element analysis. Experimental tests based on impedance response analysis in first and second modes are carried out on the prototype. Results confirm the appropriate design of this transducer, demonstrating the highest mechanical quality factor between the resonant transducers in the literature.
A full-range hybrid device for sound reproduction
Braghin, Francesco,Castelli-Dezza, Francesco,Cinquemani, Simone,Resta, Ferruccio Techno-Press 2013 Smart Structures and Systems, An International Jou Vol.11 No.6
The paper deals with the design of a device for sound reproduction to be fixed to a supporting surface. The device is made up of two different types of acoustic actuators based on different technologies. This allows to reproduce sound in the range of frequencies from 20 Hz to 20 kHz. The generation of sound at high frequencies is demanded to a magnetostrictive actuator, while a more traditional magnetodynamics actuator is used to generate sound at low frequencies. The coupling between these two actuators leads to a device having small overall dimensions and high performance.
A full-range hybrid device for sound reproduction
Francesco Braghin,Francesco Castelli-Dezza,Simone Cinquemani,Ferruccio Resta 국제구조공학회 2013 Smart Structures and Systems, An International Jou Vol.11 No.6
The paper deals with the design of a device for sound reproduction to be fixed to a supporting surface. The device is made up of two different types of acoustic actuators based on different technologies. This allows to reproduce sound in the range of frequencies from 20 Hz to 20 kHz. The generation of sound at high frequencies is demanded to a magnetostrictive actuator, while a more traditional magnetodynamics actuator is used to generate sound at low frequencies. The coupling between these two actuators leads to a device having small overall dimensions and high performance.