Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Fabrication of Higher Directivity Acoustic Transducer Using the Self-demodulation Effect

자기복조 효과를 이용한 초지향성 음향트랜스듀서 제작

  • 고영준 (영남대학교 대학원 센서 및 시스템공학과) ;
  • 남효덕 (영남대학교 전자정보공학부) ;
  • 서희돈 (영남대학교 전자정보공학부) ;
  • 장호경 (경산대학교 자연과학부)
  • Published : 2001.09.01
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Abstract

Higher directivity acoustic transducer using the self-demodulation effect was fabricated. The structure of transducer was designed such as dimension and support type of the piezoelectric element, the vibrating metal plate, and the housing case. Based on the design, the transducer was fabricated and measured its acoustic characteristics. Also, AM modulated driving circuit was designed for using the self-demodulation effect. The piezoelectric sounder with 200kHz resonant frequency and 20kHz bandwidth was designed by considering the sharp directivity and the sound pressure. The design and fabrication method worked in this study can be utilized in development of various speakers with higher directivity and broader bandwidth.

Keywords

References

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