The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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Analysis of the Relation Between Micro-Speaker with the Back Holes and the Ducted Speaker-System

후면기공을 갖는 마이크로스피커와 덕트형 스피커시스템사이의 연관성 해석

  • 이에스더 (계명대학교 음악공연예술대학 뮤직프로덕션과) ;
  • 오세진 (주성대학 음향공학과)
  • Published : 2007.04.30
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Abstract

In this study, the property and the structure of micro-speaker had been firstly shown to be treated as a ducted speaker-system, which was consisted of the unit and the ducted enclosure. With the decrease of total hole area. the resonance frequency of micro-speaker was decreased due to increasing the stiffness or reducing the compliance. The behavior of resonance frequency relative to the total hole area was exactly agreed with that of the square root of compliance. With decreasing the total hole area. the effective chamber volume was increased, but the reference sound pressure level was exponentially reduced in the low and middle frequency range.

본 연구에서는 마이크로스피커의 구조와 특성을 유닛과 덕트형 인클로저로 구성되어 있는 일종의 덕트형 스피커시스템처럼 취급할 수 있음을 처음으로 보여주었다. 후면기공의 면적이 증가할수록 스티프니스는 감소하고 컴플라이언스는 증가하였다. 그 결과로써, 후면기공의 면적이 증가할수록 공명진동수가 컴플라이언스의 제곱근에 비례하여 증가하였다. 후면기공의 면적이 감소함에 의하여 중저음 영역에서의 기준음압레벨이 지수함수적으로 감소하였다.

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References

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