건축도시공간연구소

Architecture & Urban Research Institute

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한국소음진동공학회|한국소음진동공학회논문집 2020년 2월

논문명 공기청정기의 구조기인소음 저감 / Reduction of Structure-born Noise in an Air Purifier
저자명 이부영 ; 류석원 ; 정진태
발행사 한국소음진동공학회
수록사항 한국소음진동공학회 논문집, Vol.30 No.01 (2020-02)
페이지 시작페이지(60) 총페이지(7)
ISSN 1598-2785
주제분류 환경및설비
주제어 공기청정기; 구조기인소음; 날개 통과 주파수; 모드 실험 ; Air Purifier; Structure-born Noise; Blade Passing Frequency; Modal Testing
요약2 In this study, we identified structure-born noise in a household air purifier and presented a method for reducing such noise. After noise signals from the air purifier were measured using a microphone, a frequency analysis was conducted to find the source of the noise. To identify the location where the structure-born noise originated, the vibration signals of the scroll were measured, and the frequency components of the measured signals were compared with the noise frequency components. The experimental results confirmed that a forced vibration occurs in the scroll of an air purifier owing to a pressure change caused by the impeller rotation, and this vibration induces the structure-born noise. In addition, modal testing showed that the structure-born noise is amplified when the natural frequency of the scroll radiating the noise coincides with the blade passing frequency. Finally, to reduce the structure-born noise, a damping material was attached to the scroll, and it was then experimentally confirmed that the overall sound pressure level was reduced by 1.2dBA.
소장처 한국소음진동공학회
언어 한국어