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http://dx.doi.org/10.7776/ASK.2013.32.3.191

Design and Fabrication of Multi-mode Wideband Tonpilz Transducers  

Kim, Jinwook (School of Mechanical Engineering, Kyungpook National University)
Kim, Hoeyong (Development Team 3, Hanwha Corporation Gumi Plant)
Roh, Yongrae (School of Mechanical Engineering, Kyungpook National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.32, no.3, 2013 , pp. 191-198 More about this Journal
Abstract
In this paper, we designed a wideband Tonpilz transducer, and verified the validity of the design through experiments. The wide frequency bandwidth was achieved by coupling the fundamental longitudinal mode of the transducer with a flapping mode of the head mass. Structure of the Tonpilz transducer was optimized by means of the finite element method and genetic algorithm to achieve the widest fractional bandwidth under design constraints. The optimized structure showed a far wider -6 dB fractional bandwidth of transmitting responses than that of single mode transducers. For verification of the design result, we manufactured a transducer prototype of the designed structure and characterized its performance, which showed good agreement with the design results.
Keywords
Tonpilz transducer; Flapping mode; Multi-mode; Wideband; Transmitting voltage response (TVR);
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Times Cited By KSCI : 1  (Citation Analysis)
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