The object of this paper is to examine the noise generating mechanism at manufacturing process of metal material products. To accomplish the object; A noise generating mechanism of high noise machine, which is mounted in the small and medium size enterprise, was investigated. The measurement method of the noise for the machine by manufacturers were investigated. The noise at the 250 point of the manufacturing procrss machine in the 40 processes of the 3 factories, 3 business fields was measured. The database of the noise was built from the measurement data. The major sound sources and frequency range for the manufacturing processes of metal product machine was investigated.

1. 서 론
 2. 소음기의 설계
 3. 실험장치 및 방법
 4. 실험결과 및 분석
 5. 결 론
 후 기
 References

• 김병삼(원광대학교 공과대학 기계자동차공학부) | Byoung-Sam Kim Corresponding Author
• 박진영(원광대학교대학원 기계공학과) | Jin-Young Park