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Acoustic characteristics of a loudspeaker obtained by vibration and acoustic analysis

진동/음향 해석에 의한 스피커의 음향특성 연구

  • 김정호 (삼성종합기술원 수퍼컴응용 Lab) ;
  • 김준태 (삼성종합기술원 수퍼컴응용 Lab) ;
  • 김진오 (숭실대학교 기계공학과) ;
  • 민진기 (삼성전기(주) CAD/CAM연구실)
  • Published : 1997.10.01

Abstract

The acoustic characteristics of a direct radiator type loudspeaker has been studied in this paper. The natural modes of the speaker cone vibration analyzed numerically by the finite element method have been verified by comparing them with experimental results. The so-ap-proved finite-element model has been used to calculate the vibration response of the cone excited by the voice coil. The vibration displacement of the speaker cone paper has been converted into the vibration velocity and used as a boundary condition for the acoustic analysis. The frequency characteristics, directivity, and sound pressure distribution of the loudspeaker have been calculated by the boundary element method. The numerical results have been verified by the experiments carried out in an anechoic chamber. The variations of the acoustic characteristics due to the changes of some design parameter values can be examined using the numerical model.

Keywords

Loudspeaker;Finite Element Method;Boundary Element Method;Vibration;Acoustic Characteristics;Frequency Characteristics;Directivity;Sound Pressure Distribution

References

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