• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.316-323
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• 2003

The gear system is commonly applied in the marine propulsion shafting system using the diesel engine with the power take off/in system and it also is necessary to reduce propeller revolution increasing the propulsion efficiency. The diesel engine has the advantage more than other thermal engines in high thermal efficiency and mobility. But the large vibratory torque which induced by higher combustion pressure is transmitted to these gears. In this paper, the surface durability and bending stress of gear system considering vibratory and transient torque is evaluated by ISO and AGMA regulation. And the influence of these in gear design is investigated with the theoretical analysis and onboard measurement result of torsional vibration.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.1126-1131
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• 2002

Offices and other multipurpose buildings commonly have suspended ceilings installed over room dividing wall. But Korean Standards don't include any code on test methods and test facility of the suspended ceiling system. Therefore, test methods and test facility from ISO or ASTM have been used for evaluating sound performance in domestic so far. In this study, every regulation from ISO, ASTM, especially for airborne sound insulation against suspended ceiling system, is analyzed in order to apply to establishment of Korean Standards on test methods and test facility of suspended ceiling system and materials.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 춘계학술대회논문집
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• pp.1194-1197
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• 2006

Recently, international standard for measurement of sound absorption in a reverberation room has been amended. In the revised version, temperature, humidity and air pressure conditions are strictly restricted and also the concrete procedures are presented to reduce the differences in test results by adding inspection of diffusion, measurement uncertainty etc. In this paper, the systematic tests are conducted based on the inspection guide of diffusion defined by ISO 354 and the effects of diffusers on the measurement of sound absorption ratio are considered. As a result, we perceived that the averaged sound absorption ratio in mid and high frequency range is expected to measure around $0.05{\sim}0.1$ higher in high sound absorption material. Therefore, as for the reverberation room for measurement of sound absorption, we need to take into consideration not only the spatial standard deviation of sound pressure mandated by ISO 3741, but also, inspection regulation of diffusion showed by ISO 354.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 춘계학술대회논문집
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• pp.1198-1201
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• 2006

ISO 140-1 recommends installing diffusing elements in the room if there are large variations of the sound pressure level caused by strong standing wave. Also it requires that reverberation time should not be long or short. In accordance to this regulation, we adjusted the reverberation time in the range of $1{\sim}2$ sec by using 4 types of diffusing elements. This paper demonstrates how to balance the reverberation time in the range of $1{\sim}2$ sec by using several types of diffusing elements.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.255-260
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• 2003

The regulation for floor impact sound level is expected to be amended to 50㏈(L$\_$i, Fmax, AW/) and below in heavy-weight impact sound and 58㏈(L'$\_$n, AW/) and below in light-weight impact sound in Korea. The purpose of this paper is to analyze the influence factors of floor impact sound levels in apartments. The influence factors were air pressure of bang machine, height of microphones, data acquisition rate, etc. The air pressure range of bang machine were from 2.2 Pa to 2.6 Fa. Five microphones were installed at a height of 0.5m, 0.7m, 0.9m, 1.2m, 1.5m or 1.7m from floor level. The floor impact sound level was varied about 1-3㏈(L$\_$i, Fmax, AW/) in heavy-weight impact sound according to the influence factors.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.796-799
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• 2005

In 2005, a regulation on the heavy-weight impact sound was released, which restricted concrete slab thickness of standard floor to 210mm. To reduce heavy-weight impact sound, damping materials and structural reinforcement system have been proposed. In this study, the effect of compressive strength on the heavy-weight impact vibration and sound were investigated. FEM analysis was conducted for the 34PY apartment with different concrete strength (210, 350, 420kg/cm$^2$). In addition, apartment floors with different concrete strength were constructed and the floor impact vibration and sound were measured. Results of FEM analysis and measurement show that the resonance frequency of concrete slab was increased by the increment of concrete strength. However, floor impact sound pressure level did not decrease because the nor impact vibration and sound pressure level in 63Hz band increased.

• 소음진동
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• 제8권6호
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• pp.1009-1014
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• 1998

유럽 18개 국가의 표준제정기구가 회원으로 구성되어 있는 유럽 규격제정 위원회(CEN：Comite europeen de Normalisation 또는 European Committee on Standardization)는 유럽 내에서 시판. 사용되는 모든 제품이 만족해야 할 규격 또는 규제안(regulation)을 제정하는 일을 담당하고 있다. 이들이 제정하는 규격의 기본적인 내용은 국제규격이나 각 나라의 규격과 대동소이하지만 그 내용에 있어서 구체적인 제품을 지정하기 때문에 보다 세분화되어 있으며 상업적인 성격을 띈다는 측면에서 ISO, DIN. BS등의 국제표준규격과 성격을 달리한다고 할 수 있다 특히, 이 위원회에서 공동으로 제정된 사안은 각 회원국에서 수정 없이 그대로 국가 인증규격으로 사용하므로 산업계에서는 상당한 영향력을 지닌 기구라고 할 수 있다.(중략)

• 한국조명전기설비학회지:조명전기설비
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• 제13권2호
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• pp.156-156
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• 1999

This paper describes the characteristics and the criteria of electrical environmental effects produced from power system especially transmission line. Audible noise radio and TV interference, electric and magnetic inductions which are main items for optimal conductor selection as well as major contributors to the community complaint of electrical environmental problem, are surveyed and studied comparing with the criteria or the environmental protection regulation of domestic and foreign countries. As a result a domestic criteria of electrical environmental on power system was suggested.

• 전기전자학회논문지
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• 제15권3호
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• pp.218-226
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• 2011

본 논문은 현재 유선방송 기술기준에서 CDMA 이동통신서비스 대역의 누설전자파 기준이 적절한지를 검증하고자 하였다. 먼저, CDMA 2000 1X 기지국 장비를 통한 실험결과로부터 CDMA 이동통신 시스템의 최대 허용 간섭 레벨은 -110dBm/1.23MHz인 것으로 분석되었다. 이를 토대로 이동통신기지국에 거의 영향을 주지 않을 케이블 방송 옥외 전송설비의 누설 간섭전력의 임계레벨과 누설전자파 세기를 산출하였다. 일반적으로 옥외에서 측정되는 외부시스템의 배경 간섭레벨인 -100~-80dBm/1.23MHz에 대해서 허용될 수 있는 케이블 방송 설비의 누설전자파 임계치는 현행 유선방송 기술기준을 만족시키지 못하였다. 이것은 현행 기술기준이 지나치게 최악의 경우를 상정하여 설정되었음을 의미하므로 이동통신사업자의 실제적인 기지국 조건을 적용하여 합리적인 기술기준을 마련하여야 할 것이다.

• 한국건설관리학회논문집
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• 제5권6호
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• pp.110-117
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• 2004

건설사업과 환경보전은 대립적인 요소를 많이 가지고 있어 건설사업으로 인한 환경 분쟁이 급증하고 있으며 소음 $\cdot$ 진동에 관한 분쟁이 대부분을 차지하고 있다. 이러한 분쟁과 민원은 기업에 대한 부정적 이미지, 사업의 지연 $\cdot$중단, 배상액 지불 등 막대한 경제적 손실을 가져오므로 치밀하게 관리할 필요가 있다. 본 논문에서는 문헌조사를 통하여 이론적인 고찰을 실시하고, 소음 $\cdot$진동 관련 법령을 정리 분석하여 건설사업과 관련된 검토항목을 추출하였다 또한 사전 환경성 검토 환경영향평가 항목과 분쟁조정에 관한 통계자료를 검토 $\cdot$분석하여 건설사업의 추진단계별 소음 $\cdot$ 진동 관리방안을 제시하였다 이는 건설사업을 수행함에 있어서 소음 진동에 관한 규제사항의 정확한 준수와 분쟁 및 민원의 발생을 최소화하는데 활용될 수 있을 것이다.