In the car speaker, because the sound characteristics is changed by the space of car which mount the speaker, the speaker elements must be decide according to sound field. In this study, the nonlinear characteristics, the frequency response and the sound pressure for the same size speakers which is adapted to domestic car model are investigated. The car model is classified to semi-midsize, midsized, full size automobile in order to change the car space. As a results, we can investigate the differences of the force factor and the stiffness of suspension system for speaker. According to the change of the speaker characteristics, the sound pressure is changed, also. In the future, these data will be used to investigate the correlation between the sound quality and measurement data.

ABSTRACT
1. 서 론
2. 스피커의 비선형 특성
3. 스피커의 음압 특성
4. 결 론
References

• 이태근(Department of Precision Mechanical Engineering, Daeduk College) | Tae-Keun Lee
• 이영욱(Department of Global Industry, Kijeon College) | Young-Uk Lee
• 김병삼(Department of smart automobile engineering, Wonkwang University) | Byoung-Sam Kim Corresponding Author