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. 소음의 위치 검출 및 방법
  2.1 신호의 도달 지연 시간 값
  2.2 두 개의 마이크 사용으로 위치 추적 방법
 3. 실험 및 결과
  3.1 실험 구성 요소
  3.2 실험 결과
 4. 결론
 후기
 참고문헌

• 김정현(경성대학교 메카트로닉스공학과) | Jung Hyun Kim