인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
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 1.2 dBA.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
최근 본 자료 전체보기
UCI(KEPA) : I410-ECN-0101-2020-424-000374490