Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Identification of Nonlinear Parameters of Electrodynamic Direct-Radiator Loudspeaker with Output Noise

출력 소음을 고려한 직접방사형 라우드스피커의 비선형 매개변수 규명

  • 박석태 (아주대학교 공과대학 시스템공학과 고등기술연구원 자동차기술연구소) ;
  • 홍석윤 (서울대학교 공과대학 조선해양공학과)
  • Published : 1998.10.01
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Abstract

It has been resulted that Lagrange multiplier method with statistical approach was superior to traditional harmonic balance method in identifying the nonlinear loudspeaker parameters when output signals were contaminated with Gaussian random noise. We have known that the displacement-dependent characteristic values of nonlinear parameters identified by traditional harmonic balance method were estimated less than original values by the increase of output noise and the stiffness coefficients were very sensitive to output noise. Also, by the sensitivity analysis we have verified that the harmonic distortions in acoustic radiation was mainly due to nonlinearity of force factor caused by uneven magnetic fields and that reducing the nonlinearity of damping coefficients were very effective for improving second harmonic distrotion of acoustic radiation.

Keywords

References

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