This paper presents the detection and diagnosis of air-conditioner electromagnetic sound through noise measurements. Electromagnetic sound originating from the motor is an unpleasant source of unwanted noise that should be detected at the manufacturing stage. A detection system using sound measurements was built and a detection algorithm based on FFT analysis is presented. Sound measurements are preferable over direct vibration measurement because it is non-contact and low cost. Experimental results show that our sound measurement system can detect electromagnetic sound effectively compared to using vibration measurements.

Abstract
 1. 서론
 2. 자기음 원리 및 검출
  2.1 에어컨 모터의 자기음
  2.2 검출방법
 3. 실험 방법 및 결과
  3.1 실험 구성
  3.2 진동 센서
  3.3 소음 측정 시스템
  3.3 소음측정 자기음에 대한 시간 변화
 4. 결론
 참고문헌

• 김정현(경성대학교 공학기술연구소 겸임연구원) | Jung Hyun Kim