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조현호(Hyeonho Jo),성원찬(Wonchan Seong),김성현(Seonghyeon Kim),박동철(Dongchul Park),강연준(Yeonjune Kang) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.4
Quantifying the perception of human is of great interest for the optimal characterization of the interaction of persons with their environment. The direct approach to such measurements is based on jury-test methods. In this study we consider which jury-test method is more efficient and exact way to measure the preferences for operating sound of car. Moreover we needed to research selection criteria of jury-test methods is accordance with the properties of sound samples. We choose two sample sounds; door locks which generate simple impact sounds and window lifts which are consisted of long and complex sound. For each sound sample we conducted two jury-test methods respectively and discussed about the results.
마스킹 효과를 이용한 선셰이드 모터음의 최소가청치 특성에 관한 연구
조현호(Hyeonho Jo),성원찬(Wonchan Seong),김성현(Seonghyeon Kim),박동철(Dongchul Park),강연준(Yeonjune Kang) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.4
Panorama Sun roof’s sun shade motor elicits two major sounds when operating: the tonal sound and the white noises. Generally, the sound related to the sharpness contributes the most to the quality of motors’ tonal sound. The primary masking of this study was to set the loudness of the motor’s objective tonal sound utilizing the masking effect by its white noises. To conduct this study, the sound made by the operating sun shade motor was categorized into two different subsets of masker and test tone to examine the masking threshold. Also, the shifts of masking threshold were observed with the varying masker loudness.
자동차 도어랫치의 음질 지수 개발 및 단품 개선을 통한 음질 향상 연구
조현호(Hyeonho Jo),성원찬(Wonchan Seong),김성현(Seonghyeon Kim),박동철(Dongchul Park),강연준(Yeonjune Kang) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10
The purpose of this study is that developing the index which evaluate sound quality of door latch and improving its sound quality through that results. For that, various operating sound of door latch was used for jury test. Loudness and sharpness related metrics are dominant in sound quality index we developed. This research investigate the main transfer path of its operating sound through sound field visualization and get conclusion that could reduce the impact sound of door latch. Therefore, we could verify sound quality improvement of modified product by using sound quality index.
성원찬(Weonchan Sung),조현호(Hyeonho Jo),김성현(Seonghyeon Kim),박동철(Dongchul Park),강연준(Yeonjune Kang) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
The purpose of this study is to identify the significant sound quality metric and compose the sound quality index of motor driven roller blind which is part of vehicle sunroof. Before subjective evaluation, sound characteristics of roller blind was analyzed and set the target operating sound for subjective evaluation. Thus, transfer sound of roller blind which has the characteristics of sound modulation was used for subjective evaluation. Linear regression was carried out by chosen Zwicker’s metrics which are pointed by comments of jurors. Loudness and sharpness related metrics are prime metrics in sound quality index we composed. Effect of roller blind assay when it is attached to real vehicle was identified to evaluate the validity of index.