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Smart Structures and Systems Volume 11, Number 6, June 2013 , pages 605-621 DOI: https://doi.org/10.12989/sss.2013.11.6.605 |
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A full-range hybrid device for sound reproduction |
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Francesco Braghin, Francesco Castelli-Dezza, Simone Cinquemani and Ferruccio Resta
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| Abstract | ||
| 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. | ||
| Key Words | ||
| acoustic actuator; magnetostrictive actuator; magnetodynamics actuator; sound reproduction; loudspeaker | ||
| Address | ||
| Francesco Braghin, Francesco Castelli-Dezza, Simone Cinquemani and Ferruccio Resta : Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, Milan, 20156, Italy | ||