• 한국소음진동공학회논문집
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• 제21권10호
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• pp.883-889
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• 2011

The brand sound of vehicle diesel engine is recently one of the important advantage strategies in the automotive company. Because various noise components masked under high frequency level can be audible in quieter driving situation. Many researches have been carried out for subjective and objective assessments on vehicle sounds and noises. In particular, the interior sound quality has been one of research fields that can give high quality feature to vehicle products. Vehicle interior noise above 500 Hz is usually controlled by sound package parts. The materials and geometries of sound package parts directly affect on this high frequency noise. This paper describes the sound quality evaluation method for the vehicle diesel engine noise to establish objective criteria for sound quality assessment. Considering the sensitivity of human hearing to impulsive sounds such as diesel noise, the human auditory mechanism was simulated by introducing temporal masking in the time domain. Furthermore, each of the human auditory organs was simulated by computer codes, providing reasonable analytical explanations of typical human hearing responses to diesel noise. This method finally provides the sound quality index of vehicle diesel engine noise that includes high frequency intermittent offensive sounds caused by impacting excitations of combustion and piston slap.

• 감성과학
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• 제4권1호
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• pp.43-51
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• 2001

When consumer evaluates a product, every aspec of the product affects the evaluation. Human uses at least five sensory organs for the evaluation. Multi-sensory or multi-modal design tries to add auditory and olfactory factors to the traditional visual-centered design. For the multi-modal design, it is essential to understand relationships between combined sensory stimuli and human sensibility. Information between simple sensory stimulus and human sensibility is pre-requisite to combine multi-modal stimuli. This study investigated human sensibility against 8 colors and 30 sounds, presented independently. The combined stimuli of color and sound were made based on the sensibility generated by each stimulus. Human sensibility generated by the combined stimuli of color and sound were made based on the sensibility generated by each stimulus. Human sensibility generated by the combined stimuli was investigated with 20 female subjects. For combined stimuli that generated the same kind of sensibility respectively, generated sensibility was same but strength was diminished. For combined stimuli that generated the different sensibilities respectively, subjects showed neutral sensibility or no special sensibilities. Sensibilities to the same stimuli also showed difference depending on personal background of the subjects.

• International Journal of Advanced Culture Technology
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• 제7권2호
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• pp.218-226
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• 2019

In modern society, people live in an environment with artificial or natural noise. Especially, the sound that corresponds to the artificial noise makes the noise itself and affects each other because many people live and work in the city. Sounds are generated by the activities and causes of various people, such as construction sites, aircraft, production machinery, or road traffic. These sounds are essential elements in human life and are recognized and judged by human auditory organs. Noise is a sound that you do not want to hear by subjective evaluation, and it is a loud sound that gives hearing damage or a sound that causes physical and mental harm. In this study, we introduce the method of stimulating the human hearing by finger vibration and explain the advantages of the proposed method in various kinds of a noise environment. And how to improve the sound quality to improve efficiency. In this paper, we propose a method to prevent the loss of hearing loss and the transmission of sound information based on proper signal to noise ratio when using portable IT equipment in various noise environments.

• 한국가구학회지
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• 제21권2호
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• pp.133-143
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• 2010

Although past design developments that emphasized only the outer appearances of products were mostly concentrated on the areas of forms and colors in an attempt to satisfy humans' visual needs, it is expected that future designs to come will go in the direction to stimulate more diversified human senses. This means expansions to the five senses including the auditory sense, the sense of smell, the tactile sense and the taste and even to the area of synesthesia where two or more senses are stimulated or coexist. Although the dictionary definition of synesthesia is a concept of arousing another sense through a sense, studies of synesthesia in design go one step further from here to mean compound senses, that is, the synesthesia in an expanded meaning to feel an object (thing) through many sensory organs simultaneously. The synesthesia in the expanded meaning is applying multiple senses simultaneously in recognizing one thing to comprehensively judge and feel the thing. Recent design trends are going in a direction to basically satisfy humans' visual needs through controlled forms and colors while inducing another new feeling through expressions of diverse feels of materials within existing forms. In this change of the times, studies on furniture designs are conducted through factors of in synesthesia linked with other senses and have an important meaning that can enhance the value of designs.

• 한국소음진동공학회논문집
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• 제25권2호
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• pp.90-100
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• 2015

Recently, creating a signature sound for a brand has become more important in the automotive industry. It is important to remember that the people inside a vehicle are not the only one, who assess the signature sound, exhaust sound has become a more important factor. Most research has used psycho-acoustic parameter to objectively measure the aesthetic qualities of exhaust sound. However, these results do not parallel the results from subjective analysis. Therefore, this research focused on developing a method for objective quantification to assess the aesthetic qualities of exhaust sound in order to help develop a more appealing signature sound. To do so, the actual exhaust sound was synthesized and subjectively assessed at varied frequencies samples of 30 individuals employed at sejong R&D center. The results were analyzed using the science of harmony scale.

• 전자공학회논문지
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• 제53권12호
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• pp.161-168
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• 2016

최근 스마트폰의 대중화 및 저가형 헤드 마운트 디스플레이(head mounted display, HMD) 보급으로 가상현실(virtual reality, VR)이 다양한 분야에 응용되고 있다. VR HMD는 시각, 청각 등 인간의 감각기관을 통해 실제와 같은 체험을 가능케하는 인터페이스 기기이다. 양안 디스플레이, 360도 콘텐츠 구현, 깊이 정보에 의해 구현됨에 따라 인간의 여러 감각기능 중 시각과 관련이 있다. 기존의 연구는 주로 멀미, 시각피로와 같은 유해성 측면에 대한 감소 방안 연구가 주로 이루어졌으며, 시각 치료 등에 대한 연구는 부족한 실정이다. 따라서 본 논문은 VR HMD 에서의 비전 테라피 활용을 위한 기술 요소 도출 및 활용 가능 분야를 알아본다. 이를 위해 기존 사례연구 및 기술 요소를 분석하여 비전 테라피 16 분야를 도출하였고, VR HMD 시표 활용을 위한 광학적 파라미터를 도출하였다. 본 연구 결과는 VR HMD 기반을 둔 비전 테라피 시표 개발에 활용 될 것으로 기대된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제13권2호
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• pp.129-136
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• 1991

Fibrin Sealants 는 과거 간, 비장, 신장등의 일반외과 수술에서 단순한 외과적 봉합으로는 해결하지 못하는 넓은 면적의 조직의 유착을 위하여 1940 년경 부터 개발되기 시작한 것으로 악안면 영역에서는 1970 년대 중반부터 미세신경접합술과 피부이식을 위하여 사용되기 시작한 후, 현재, 골이식후의 골세편의 고정, 혈관봉합술, 연조직에서 조직들의 유착과 지혈, 그리고 혈관종의 치유등을 목적으로도 광범위하게 연구되고 사용되고 있다. 이것은 인체에서 채취한 혈액응고인자 XIII 을 포함하는 Fibrinogen 성분과, 소에서 추출한 Thrombin 의 두가지 주요 성분으로 구성되며, Fibrinogen 용해제인 Aprotinin 액과 Thrombin 용해제인 염화칼슘액과 함께 네부분으로 구성된다. 각제품에 따라 그리고 사용된 농도에 따라 차이는 있으나, 대개 수분후에 조직이 응고되어 달라붙기 시작하고, 수시간후에 최대접착효과에 도달하며, 응고된 접착효과는 12 일에서 15 일간 유지되고 그후 정상적인 섬유소분해작용과 식세포활동에 의하여 분해된다. 저자는최근 6 개월간 서울대학교병원 구강악안면외과에서 28 명의 각종 질환 및 기형 환자에서 미세신경봉합술, 피부이식, 악교정성형술과 구개파열 또는 하악골 재건을 요하는 환자의 골이식후의 골세편의 고정, 경부곽청술이나 종양제거술후 각종 피부판 또는 근피판을 이용한 연조직의 적합, 혈관종의 처치, 후이개접근 법에 의한 악관절수술후의 외이도의 접합등 다양한 목적을 위하여 적용된 Fibrin Sealants 를 사용하여 양호한 결과를 얻었기에 보고하는 바이다.