• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.682-686
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• 2002

It is increasing the interest on the comfortable dwelling environment, while sound Insulation performance of materials and elements used in building is falling down as they become thicker and lighter. Therefore, sound insulation performance in building has become the most important factor determining the level of housing, especially for apartment that has common wall and floor with next neighbors. This paper aims to experiment the sound insulation characteristics of floor coverings as their types and to analyse their noise reduction effect.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.384-385
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• 2013

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1995년도 춘계공동학술대회논문집; 전남대학교; 28-29 Apr. 1995
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• pp.515-528
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• 1995

Slips and falls are the major causes of the pedestrian injuries in the industry and the general community throughout the world. With the awareness of these problems, the friction coefficients of the interface between floorings and footwear have been measured for the evaluation of slip resistant properties. During this measurement process, the surface texture has been shown to be substantially effective to the friction mechanism between shoe heels and floor surfaces under various types of walking environment. Roughness, either of the floor surface or shoe heels, provides the necessary drainage spaces. This roughness can be designed into the shoe heel but this is inadequate in some cases, especially a wear. Therefore, it is essential that the proper roughness for the floor surface coverings should be provided. The phenomena that observed at the interface between a sliding elastomer and a rigid contaminated floor surface are very diverse and combined mechanisms. Besides, the real surface geometry is quite complicate and the characteristics of both mating surfaces are continuously changing in the process of running-in so that a finite number of surface parameters can not provide a proper description of the complex and peculiar shoe - floor contact sliding mechanism. It is hypothesised that the interface topography changes are mainly occurred in the shoe heel surfaces, because the general property of the shoe is soft in the face of hardness compared with the floor materials This point can be idealized as sliding of a soft shoe heel over an array of wedge-shaped hard asperities of floor surface. Therefore, it is considered that a modelling for shoe - floor contact sliding mechanism is mainly depended upon the surface topography of the floor counterforce. With the model development, several surface parameters were measured and tested to choose the best describing surface parameters. As the result, the asperity peak density (APD) of the floor surface was developed as one of the best describing parameters to explain the ambiguous shoe - floor interface friction mechanism. It is concluded that the floor surface should be continuously monitored with the suitable surface parameters and kept the proper level of roughness to maintain the footwear slip resistance. This result can be applied to the initial stage of design for the floor coverings.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.5-6
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• 2014

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 춘계학술대회논문집
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• pp.131-136
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• 2004

Impact sounds, such as those created by footsteps, the dropping of an object or the moving of furniture, can be a source of great annoyance in residential buildings. The character and level of impact noise generated depends on the object striking the floor, on the basic structure of the floor, and on the floor covering. This study base on the evaluate of isolation performance of impact sound according to the impact noise reduction methods. Reduction methods consist of four ways. First way is increase thickness of bare floor and other ways are using the soft coverings on the floor and ceiling assembles. Last way is make floating floor with shock absorbing materials.

• 한국소음진동공학회논문집
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• 제14권9호
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• pp.811-818
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• 2004

Impact sounds, such as those created by footsteps, the dropping of an object or the moving of furniture, can be a source of great annoyance in residential buildings. The character and level of impact noise generated depends on the object striking the floor, on the basic structure of the floor, and on the floor covering. This study base on the evaluate of isolation performance of impact sound according to the impact noise reduction methods. Reduction methods consist of four ways. First way is increase thickness of bare floor and other ways are using the soft coverings on the floor and ceiling assembles. Last way is make floating floor with shock absorbing materials.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.379-382
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• 2005

Recently, we founded acoustic research laboratory consist of five reverberation rooms on the basis of ISO regulations. Four kinds of experiment are possible in our laboratory such as sound transmission loss of wall, sound attenuation of suspended ceiling, absorption coefficient, reduction of transmitted impact sound by floor coverings. We are going to provide our customers with officially authorized acoustics data.

• 한국음향학회지
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• 제42권2호
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• pp.161-167
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• 2023

최근 바닥충격음 사후 성능검사 제도의 시행에 따라 공동주택 바닥 슬래브 상부에 설치되는 바닥 마감재에 대한 바닥충격음 성능 개선의 요구사항은 증가하고 있다. 하지만 현재의 KS F ISO 717-2 및 KS F 2863에서의 바닥 마감재 성능 평가방법은 완충층이 설치되지 않은 조건에서 저감량을 측정하는 것으로 되어 있다. 준공 전 성능측정 의무화로 인해 본인이 거주하는 공동주택 바닥충격음 성능의 확인이 가능한 상황에서 입주민이 거주하는 공동주택의 특성을 반영하는 온돌층이 설치된 구조에서의 성능평가는 마감재의 바닥충격음 성능에서 더 필요한 부분일 것이다. 따라서 본 논문에서는 바닥슬래브 상부 마감구조의 저감량 평가를 위해서 완충층 조건을 포함한 저감성능 평가를 제안하고, 완충층 성능에 따른 저감량의 차이를 확인할 수 있도록 마감재가 설치되지 않은 상태의 바닥충격음 성능을 동시에 표시하는 것을 제안한다.

• Environmental Engineering Research
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• 제18권3호
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• pp.169-176
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• 2013

The present study was designed to examine the concentrations, emission rates, and source characteristics of a variety of volatile organic compounds (VOCs) in 30 newly-constructed apartment buildings by measuring indoor and outdoor VOC concentrations over a 2-year period. For comparison, seven villa-type houses were also surveyed for indoor and outdoor VOC concentrations over a 3-month period. Indoor and outdoor air samples were collected on Tenax-TA adsorbent and analyzed using a gas chromatograph (GC)/mass spectrometer system or a GC/flame ionization detector system coupled to a thermal desorption system. The long-term change in indoor VOC concentrations depended on the type of VOCs. Generally, aromatic (except for naphthalene), aliphatic, and terpene compounds exhibited a gradual deceasing trend over the 2-year follow-up period. However, the indoor concentrations of the six halogenated VOCs did not significantly vary with time changes. Similar to these halogenated VOCs, the indoor naphthalene concentrations did not vary significantly with time changes over the 2-year period. Unlike the halogenated VOCs, the indoor naphthalene concentrations were much higher than the outdoor concentrations. The indoor concentrations of aliphatic and aromatic compounds were higher for the villa-type houses when compared to those of apartment buildings. In addition, four source groups (floor coverings and interior painting, household products, wood paneling and furniture, moth repellents) and three source groups (floor coverings and interior painting, household products, and moth repellents) were considered as potential VOC sources inside apartment buildings for the first- and second-year post-occupancy stages, respectively.

• 건축역사연구
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• 제29권2호
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• pp.39-52
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• 2020

Seonjeong-jeon, the semi-great hall in Changdeok Palace, was constructed in a highly formal and conservative style and accommodated official ceremonies. However, the contemporary modification of the building has distorted or eliminated features including the two side doors on the front, the floor coverings, and the throne base (Jwa-tap) that consisted the most significant part of the throne. Seonjeong-jeon originally had three doors that stood between each pair of columns on the front side, respectively. The courtiers accessed the building through the side doors, while the central door was exclusively designated for the king. However, the renovation in 1999 ignored the political context of the architectural form of the building and changed the side doors into windows, damaging the traditional structure inherited from the early Joseon Dynasty. Although the building currently has traditional wooden floor structure (Woomul-maru), it was originally covered with square brick tiles (Bang-jeon) before the Japanese occupation, following the customs of early Joseon Dynasty. The throne was placed to the north of the central door and consisted of the throne base and a decorative roof (Dang-ga). A canvas (Jang-ja), which featured the royal symbolic painting of Sun, Moon, and Five Peaks, was also installed between the two columns that connected the base and the roof. Nevertheless, only the columns and the blank canvas remain nowadays after the removal of the base.