• 한국정보통신학회논문지
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• 제13권6호
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• pp.1188-1193
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• 2009

최근 젊은 층을 중심으로 블루투스 헤드셋 등 착용형 청음기기에 의한 소음성 난청을 겪고 있다. 본 논문에서는 청력 손상을 주로 일으키는 감도가 높은 주파수대에서 개인별 청각 특성과 최대가청한계를 고려하여 소리 크기를 조절함으로써 블루투스 헤드셀에서의 청각 손상을 감소하는 동시에 보다 자연스런 음량 조절이 가능한 방법을 보인다. CSR Bluetooth headset example design board(DEV-PC-1645)에 구현한 실험에서 청력 특성이 좋은 대역에서 기존 방법에 비해 보다 낮은 소리 크기에서 불편없이 인지 가능하였다. 또한 그 결과로써 과도한 대역별 소리 에너지를 줄여 청각 손상도 방지할 수 있었다.

• 한국소음진동공학회논문집
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• 제20권12호
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• pp.1210-1215
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• 2010

Unit cabin means room, which is installed in the high value-added vessel such as drill ship, offshore platform and FPSO, after pre-assembled. In order to develop the noise control design for a unit cabin, a variety of acoustic tests such as sound absorption, transmission and radiation measurements were carried out by using the deckhouse mock-up. From the tests, it was found out that the sound transmission loss between cabin and corridor was 13 dB below than FPSO standard and the combined noise level of the unit cabin was dominated by the radiated noise from wall panel in low frequency range. Based on the test results, design guidelines for the noise control of the unit cabin were fully established, such as the improvement of sound transmission loss between the cabin and corridor, and radiated cabin noise reduction.

• 한국실내디자인학회논문집
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• 제18권1호
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• pp.19-26
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• 2009

Aalto designed his own modern architecture in comparison with other modern architects of his days. It is because Aalto went beyond the principle of dogmatic functionalism based on his attitude not to copy images of functionalism but to fulfill function of the building. He decided architectural form and space according to logical basis including the effective use of light and sound. Vuoksenniska church, as is called the most exceptional and notable church in his works, was designed based on the fulfillment of program. As he knew that the program needed the extension of the main church space into social areas, he put emphasis on individuality of space rather than the wholeness of space. Sound and light analysis of Vuoksenniska church shows that Aalto tried to have adequate environment of each space at the start and Integrate them later. The spatial configuration of Vuoksenniska church shows that the individuality of space has priority over the wholeness of spaces. Discordance between roof form and ceiling is the best example for this matter. Aalto designed various windows that have different sizes, figure and location to induce desirable light for each space of the church. He also adjusted the shape of the ceiling and the angle of wall for a effective sound transmission. This result indicates that he knew the activity of the church is normally confined to one weekly morning and the whole space Is hardly used as a religious purpose.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집 특별세미나,특별/일반세션
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• pp.457-462
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• 2009

In a high speed train, aluminium extruded panel is widely used in floor, side wall and roof structures for high bending stiffness and weight reduction. However, with some inevitable reasons, aluminium extruded panel shows inferior sound insulation performance compared with the flat panel having same weight. Especially, occurrence of local resonance modes in the particular frequency band, is one of the main reason in the deterioration of the sound insulation performance. Local resonance modes are generated in the structure which consists of periodic unit structure, such as the aluminium extruded panel. The local resonance frequency is determined by the specification of the unit structure. In this study, we predict the local resonance frequency band on the aluminium extruded panel used for the high speed train, and investigate how the design modification in the unit structure influences the local resonance frequency band and panel bending stiffness. The purpose of the study is to provide the design information for the effective unit structure in order to improve the sound insulation performance of the aluminium extruded panel.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1994년도 춘계학술대회논문집
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• pp.75-84
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• 1994

A control panel layout method based on the constraint satisfaction problem(CSP) technique was developed to generate an ergonomically sound panel design. This control panel layout method attempts to incorporate a variety of relevant ergonomic principles and design constrains, and generate an optimal or, at least, a "satisfactory" solution through the efficient search algorithm. The problem of seeking an ergonomically sound panel design should be viewed as a multiple criteria problem, and most of the design objectives should be understood as constraints. Hence, a CSP technique was employed in this study for dealing with the multi-constraiants layout problem. The efficient search algorithm using "preprocess" and "look ahead" procedures was developed to handle the vast amount of computational effort. In order to apply the CSP technique to the panel layout procedure, the ergonomic principles such as spatial compatibility, frequency-of- use, importance, functional grouping, and sequence-of-use were formalized as CSP terms. The effectiveness of the developed panel layout method was evaluated by example problems, and the results clearly showed that the generated layouts took various ergonomic design principles into account.esign principles into account.

• 감성과학
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• 제12권4호
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• pp.403-410
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• 2009

본 연구의 목적은 무선 통신 사업자 간에 휴대폰에서 제공되는 휴대폰 벨소리 사운드의 음질차이가 있는지, 있다면 어느 요소에서 발생하는지를 조사하는 것이었다. 선두 무선 통신 사업자나 휴대폰 제조사가 가지는 브랜드의 영향 요소를 배재하고 음질의 차이가 생기는 요소들을 찾아내기 위한 일련의 실험이 계획되었다. 무선 통신 사업자, 휴대폰 제조사, 휴대폰 모델, 특정 장르, 음원 콘텐츠 제작자 등 음질의 차이가 발생 할 수 있는 요소들을 테스트 하였다. 연구결과 휴대폰을 통해 제공되는 벨소리 사운드는 무선 통신 사업자별로 음질 차이가 존재하는 것으로 조사되었다. 음질의 차이는 콘텐츠 및 휴대폰의 차이에서 발생하며, 동일휴대폰 모델의 경우에도 무선 통신 사업자 모델별로 음질의 차이가 발생하는 것을 알 수 있었다. 또한 콘텐츠를 제공하는 음원 제작사 별 음질의 차이도 있는 것으로 나타났다. 음악 장르에 대한 음질의 차이는 명확하게 나타나지 않았다. 제한된 샘플을 이용한 실험의 한계를 보완하기 위하여 휴대폰 제조업체의 사운드 전문가를 통한 인터뷰가 시행되었다. 인터뷰 결과 제품 가격의 차이에서 오는 스피커 단품 및 미디, 앰프 등 하드웨어적 차이가 음질에 영향을 끼치는 것으로 조사되었고, 부품 및 기구의 튜닝 또한 중요도를 갖는 것으로 조사되었다.

• 한국소음진동공학회논문집
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• 제15권12호
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• pp.1378-1388
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• 2005

Spatial control of sound is essential to deliver better sound to the listener's position in space. As it can be experienced in many listening environments. the quality of sound can not be manifested over every Position in a hall. This motivates us to control sound in a region we select. The primary focus of the developed method has to do with the brightness and contrast of acoustic image in space. In particular, the acoustic brightness control seeks a way to increase loudness of sound over a chosen area, and the contrast control aims to enhance loudness difference between two neighboring regions. This enables us to make two different kinds of zone - the zone of quiet and the zone of loud sound - at the same time. The other perspective of this study is on the direction of sound. It is shown that we can control the direction of perceived sound source by focusing acoustic energy in wavenumber domain. To begin with, the proposed approaches are formulated for pure-tone case. Then the control methods are extended to a more general case, where the excitation signal has broadband spectrum. In order to control the broadband signal in time domain, an inverse filter design problem is defined and solved in frequency domain. Numerical and experimental results obtained in various conditions certainly validate that the acoustic brightness, acoustic contrast, direction of wave front can be manipulated for some finite region in space and time.

• 한국소음진동공학회논문집
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• 제22권2호
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• pp.115-122
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• 2012

Sound packages and damping materials have been widely applied on the floor to decrease the interior noise of a vehicle. Based on the previous researches on the low-noise vehicles, weight optimization through minimization of damping material usage is required while decreasing mid and high frequency range noise by application of sound packages. This paper describes the analysis process of robust design of vehicle body structure before applying damping materials and focuses on the analysis and test process of the location optimization at the stage of damping material application. A vibration experiment for the analysis of floor panel velocity with respect to the excitation of suspension attachment parts at the underfloor of a vehicle is performed. And through the improvement correlation between FEA and TEST, a design guide to optimize damping materials application in the early design stage is proposed. A research on vibration damping steel sheets and liquid acoustic spray on deadener(LASD) is performed to minimize manufacturing time and to minimize the space for pre-existing asphalt damping materials. As results of this study, panel stiffness is achieved through curved surface panel and bead optimization. And test baseline of optimum design is suggested through damping material optimization. And finally, through re-establishing the analysis process for vibration reduction of vehicle floors and lightweight design of damping materials, it is possible to design damping materials efficiently in the preceding stage of design.

• 한국실내디자인학회논문집
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• 제14권4호
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• pp.19-26
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• 2005

Digital technology continually makes a space evolves. The real-time behavior design communicates the data with the situation of circumference of the space(visitors moving, interior and exterior situations). The space form was changed because it interfaces in real time. The purpose of this study was finding out the characteristics of real-time behavior space design through the analysis of space formative languages, sensorium, S-R and material. This study will be the one of basic references for the digital space design. The boundary of this study set limits to the works of digital space designer who applies the real-time exchanging data to their design among the digital space design works from 1996 to 2004. But it excepted from the real-time behavior space in virtual realty. Therefore, the objects of this study were the works of onl and NOX(paraSITE, Trans-port 2001, Muscle, MotormeCCa, Handdrawspace, Saltwater Pavilion, Son-O-House, H2O Expo). The method was the contents analysis of space formative languages(Greg Lynn's ten space formative languages; bleb, blob, branch, flower, fold, lattice, teeth, shred, skins and strand), sensorium, S-R and material. The results of the study are as follows: 1) The organizational elements; Space formative languages(bleb, blob, fold, shred, skins, strand), stimulation(Human Participation, Human Moving, Weather Conditions), and response(Spatial Moving, Sound Pattern, Lighting Pattern, color Pattern, Activating Particles, Moving Picture, Virtual Friend) 2) The material Use; Sound, lights, and network have been used in the space. Immaterial matter will be used the main material of space design in 21"'century, 3)The spatial types; formal changing of space, projecting immaterial elements, and changing the sound.

• 디자인학연구
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• 제18권2호
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• pp.211-218
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• 2005

디지털정보기기의 등장은 정보의 대량생성과 대량소비라는 사회 혁명적 요소와 더불어, '기능을 위한 종속관계의 형태소멸' '유기능 무형태(宥機能 無形態)' 라는, 디자인 분야의 새로운 패러다임 형성의 원인이 되고 있다. 이러한 관점에서의 디자인 행위는 그 관심이 시각적 대상(對象)에서 벗어나 인간과 기기(器機)사이의 '관계'에 집중되고 있으며, 그 결과 디자인의 감성적 요소가 접목된 감성인터페이스라는 새로운 분야가 형성되었다. 본 논문의 목적은 멀티미디어 데이터의 검색에 있어서, 이러한 감성인터페이스를 활용할 수 있는 방안을 제시하는 것이다. 효과음과 걸음걸이(step)이를 연구대상으로 하여, 실험에서 수집된 감성어 사이의 유사성을 수량적으로 계측-분석한 후 시각화하는 것을 주된 연구방법으로 취하였다. 감성연구에 있어서 개인적인 견해 및 청각정보와 걸음걸이의 특징, 사례연구 등을 이론적 배경으로 제시하였고, 음에 관한 실험내용은 본인의 선행연구내용을 인용하였다. 걸음걸이에 대해서는, 자극에 대한 감성반응치를 수량화이론 1류를 이용한 회귀식으로 추출함으로써 걸음걸이의 물리적 요소와 감성반응 사이의 관계를 정량적으로 정리하고자 했다. 연구결과를 응용한 프로토타입의 제안은 검색환경과 사용성 평가에 대한 구체적 연구를 진행 한 후, 이어지는 연구에서 제안 할 예정이다.