Materials Technology for Car Sound and Vibration Barriers

ABSTRACT ：Recently, with developments in the automotive industry, sound and vibration damping have a considerableattraction with a diversified customer needs and advanced automobile. In general, among various materials, textile materials,such as felt and glass fibers, polyurethane foam, and PET fiber materials were used to reduce sound and vibration ofthe automobile. These materials were located in various main parts of the automobile to block sound and vibration, resultingin a comfortable ride. In addition, to improve fuel economy, weight reduction and cost saving for the automobile werealso being considered together as well as the reduction of sound and vibration of the automobile. Therefore, in this paper,we focused on the need of interior sound and vibration absorption materials in the automobile and absorption materials-relatedtechnologies. Keywords ： automobile, comfortable ride, sound and vibration damping, absorption materials † 대표저자 E-mail: sjpark@inah.ac.Kr Ⅰ. 서 론 자동차에 있어서 차량의 흡/차음재 역할은 자동차 산업의 발전과 더불어 수요자의 요구가 다양화, 고급화됨에 따라 자동차의 성능 중에 가장 큰 현안으로 대두되고 있는 문제 중 하나이다. 즉, 차내의 안락감이나 쾌적, 정숙성 확보를 위해서는 엔진소음, 타이어 소음, 거리소음 등 차내외에서 발생하는 다양한 소음을 감소시킬 필요가 있다.