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콘형 스피커와 평판형 스피커의 분할진동 패턴 특성 비교 분석
김현갑(Hyun-Kab Kim),김희식(Hie-Sik Kim),장달원(Dalwon Jang),이종설(Jongseol Lee),장세진(Sei-Jin Jang) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
Currently, break-up mode are important to the principal elements of the speakers, but the specific analysis is insufficient according to the shape of the diaphragm. In this paper, the characteristics of the split vibration pattern of the cone type sparker and the flat type speaker are compared and analyzed. Based on the measurement of the displacement of the diaphragm using laser, we derive the difference between the directivity and thermal characteristics of the vibration mode and the slim speaker. Based on this, it can be grasped how the different structural characteristics of the cone type speaker and the flat type speaker are revealed, and it is expected to be utilized as the base data in the initial design of the diaphragm.
공기청정기 소음의 음향 특성 측정을 통한 환경 민감도 분석
김현갑(Hyun-Kab Kim),김규식(GyuSik Kim),장달원(Dalwon Jang),이종설(Jongseol Lee),장세진(Sei-Jin Jang) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6
Noise pollution is now recognized as a major problem that has a direct impact on human life. This study analyzed the driving noise of air purifiers acoustically by segmenting the indoor environmental noise problem, which is recognized only by one group of environmental pollution. Due to the recent seriousness of fine dust, air purifiers have become an essential household appliance. However, research into precise analyses of the noise of air purifiers that are constantly operated indoors is insufficient. Here, acoustic analysis identifies the internal characteristics of air cleaner noise in frequency graph units, and the results indicate that low indoor noise content is affecting young adults and teens.