The loudspeaker is the directly radiated speaker which generates the sound by the vibration of cone paper. Therefore the shape and the vibration characteristics of th cone paper is important factors affecting the performance of speaker. The vibration mode of cone paper is piston mode that vibrates to the up-down direction, and we can see the divided vibration in the higher mode. Because the loudspeaker has a damper, the vibration mode is different to the mode of the only cone paper. In this study, the vibration mode of cone paper which considering the damper and the effects of the damper diameter were investigated by finite element method

Abstract
 1. 서론
 2. 라우드스피커의 구조
 3. 진동판의 진동모드 분석
 4. 결론
 후기
 References

• 이태근(대덕대학교 정밀기계공학과) | Tae-Keun Lee
• 김병삼(원광대학교 공과대학 기계자동차공학부) | Byoung-Sam Kim Corresponding Author
• 김경환(충남대학교 대학원) | Kyeong-Hwan Kim