In automobiles, the main source contributing to the resulting car interior noise is the combustion engine, including gearbox, driveline, intake and exhaust system, wind, tire. Interior noise of a vehicle is usually caused by the vibration of the vehicle’s body transmitted from engine und driveline through the mounting system. The vibration and sound radiation is extremely complex. The final result of interest is in any case the sound pressure in the driver’s ear canals. The transferpath are separated into structure-borne and air-borne path. In oder to estimate the contribution of these components to car interior noise, the total sound pressure in car interior is estimated by using Transferpathanalysis method. In dies paper, experimental simulation has been carried out to analyze transfer characteristics for car interior noise transferred from sound source of the engine and driveline. The results from this study could be applicable for optimal design of noise reduction system in car.

Abstract
 1. 서론
 2. 이론적 배경
  2.1 차량실내 음압레벨
  2.2 구조기인 소음레벨과 공기기인 소음레벨
  2.3 평기기법
  2.4 측정 개요
 3. 결과 및 고찰
  3.1 배경소음레벨
  3.2 구동부의 모드분석 및 충격소음에 의한 차량실내소음 전파특성
  3.3 엔진 구동 시 엔진룸에서 차량 실내로의 소음전파
  3.4 주행 시 차량 실내소음전파
 4. 결론
 References

• 유충준(경기대학교 기계시스템공학과) | Chung-Jun You