https://doi.org/10.1140/epjs/s11734-025-01895-3
Regular Article
Design and characteristic analysis of flexible monodirectional CNT thin film magnetic enhanced thermoacoustic transducer
1
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, School of Mechanics and Aerospace Engineering, Dalian University of Technology, 116024, Dalian, People’s Republic of China
2
School of Civil Engineering, Hunan University of Technology, 412007, Zhuzhou, Hunan, People’s Republic of China
Received:
19
June
2025
Accepted:
28
August
2025
Published online:
7
September
2025
Over the past two decades, the rapid development of nanotechnology has led to the emergence of novel nanomaterials with exceptional thermal insulation properties. Consequently, a new type of transducers has been proposed based on the thermoacoustic (TA) effects. However, the sound pressures generated by most of TA transducers have not yet met the requirement of engineering practice. To enhance the sound pressure, a flexible monodirectional CNT thin film magnetic enhanced thermoacoustic (MTA) transducer is designed and fabricated by using an external direct current (DC) bias incorporating with a static magnetic filed. A theoretical model is established to explore the characteristics of the MTA transducer, and the analytical solution of sound pressures are obtained. The effects of key influencing factors on SPLs, frequency responses and distributions of sound pressure are investigated by using the obtained solutions. Furthermore, a prototype of a CNT thin film MTA transducer is fabricated and tested by experiment. The theoretical and experimental investigations demonstrate that the sound pressure in front of the MTA transducer is significantly improved (almost doubled), while that behind the transducer is eliminated. In addition, the MTA transducer exhibits a flat frequency response, good high-fidelity performance and acoustic stability.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
