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[소음·진동] 'A'-필라 풍절음에 미치는 형상 인자에 대한 연구
이강덕(Kangduck Ih),이명한(Myunghan Lee) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
Fluctuating aerodynamic noise around A-pillar has been become more important as improving the reduction techniques in NVH, concerning to the sound quality in the cabin. Additionally, evaluating A-pillar turbulence noise and obtaining the countermeasures in the early design stage is required strongly. Configuration parameters according to the turbulence noise around A-pillar was studied intensely using neural network algorithm.
이명한(Myunghan Lee),조문환(Munhwan Cho),이강덕(Kangduck Ih),최의성(Euisung Choi) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.4
There are three significant noises from the sunroof while driving. Among them, sunroof tilt-up noise has mainly high-frequency characteristics in the side and rear openings of sunroof. Because of complex structures to operate sunroof, significant flow disturbance makes strong turbulent noise. In this study, sunroof tilt-up noise was predicted by using numerical simulation code and the results were compared with experimental data.
차량 실내 소음원 추적을 위한 독자적 음원 가시화 신기술 개발
이명한(Myunghan Lee),조문환(Munhwan Cho),이종현(Jonghyun Lee),이강덕(Kangduck Ih),김영기(Youngkey Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Vehicle interior noise visualization method could make it efficient to find the position of various wind noise sources. Modified beamforming method by spherical microphone array with 5 cameras is developed for sound source detection in the 360-degree surrounding plane. Especially, MEMS microphone is applied in order to reduce both of cost and weight of the device without any loss of detecting capability. Several kinds of annoying noise problems could be solved with efficiency and precision by applying the sound identification method.