• 제목/요약/키워드: Heavy-Weight Impact Sound Source

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중량충격원에 따른 콘크리트 바닥판의 차음특성 분석 및 평가에 관한 연구 (Analysis and Evaluation of Impact Sound Insulation of Concrete Floor Structures in Response to Characteristics of Heavy-weight Impact Sources)

  • 유승엽;연준오;전진용
    • 한국소음진동공학회논문집
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    • 제19권10호
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    • pp.1062-1068
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    • 2009
  • In this study, the impact force levels of bang machine and impact ball were measured, then the heavy-weight impact sounds generated by the bang machine and impact ball were investigated. It was found that the heavy-weight impact sources generated through modal excitation, and the impact force of the impact ball was similar to that of real impact source. The heavy-weight impact sounds were also measured in the real apartments with different slab thickness and floor structures. The results showed that the floor impact sound levels in terms of $L_{iFmax,AW}$, generated by impact ball sounds were reduced by using the resilient isolators. The frequency characteristics of heavy-weight impact sounds at 125 and 250 Hz were consistent with the characteristics of impact force spectrum. However, the difference between the impact sounds and the impact forces were found at 63 and 500 Hz due to the resonance of the floor structure and flanking noise, respectively.

건식이중바닥구조의 중량충격음에 대한 실험적 평가 - 지지구조 및 천장구조 구성에 따른 영향 - (Experiment Evaluation for the Heavy-weight Impact Sound of Dry Double-floor System - Effect of Rubber Hardness and Ceiling Structure -)

  • 연준오;김경우;최현중;양관섭;김경호
    • 한국소음진동공학회논문집
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    • 제23권1호
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    • pp.34-40
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    • 2013
  • The 1st assessment(performance test) was applied to assure the floor impact sound performance for developing the dry double-floor with the change of rubber hardness of the upper panel's support and the ceiling structure of the sub-floor. Depends on the change of the rubber hardness in sub-structure, the heavy-weight sound impact value is improved up to 3 dB, and the light-weight sound impact value is moved up to 21 dB, comparing with the bare-slab. Also, the improved value for the floor impact sound conjugating with the sub-floor's ceiling was 5 dB. Based on this result, the 2nd assessment(performance test) was made the state that the rubber hardness of the sub-floor support was ranged between 50 and 70 for considering the stability of walking patients. In addition to this process, the assessment was carried out with a variety of ceiling structure applied to the dry double-floor structure with the air flow system on the sub-floor's ceiling. The result for the 2nd assessment proved that TYPEII-3 had the better sound reduction performance in the heavy-weight impact sound test than other types, and also for the light-weight impact sound TYPEII-3 had the 29 dB sound reduction performance overall. Henceforth, based on the result the research for the sound reduction performance from the floor impact sound shall be ongoing process as well as the development of a double-dry floor and a sound reduction ceiling to suitable on the field.

실 충격원에 대한 바닥마감재 성능 분석 (Performance of floor coverings by impact sound)

  • 정진연;임정빈;이성찬;김경우
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.419-422
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    • 2014
  • Floor impact sound level is affected by various factors. This study was examined about impact sources and floor coverings influenced at floor impact sound. So this study wishes to get method to reduce sound pressure level of receiving room. Light-weight impact sound in mid frequency and Heavy-weight impact sound in low frequency was affected by floor coverings. Therefore, method to reduce floor impact sound level is to use proper floor coverings. Some coverings can amplify the heavy-weight impact sound in low frequency. Floor impact sound sources used measurement and analysis were standard heavy-impact source(Tapping, Bang, Ball) and living impact sources(Cleaner, Chair, Toy-car, Soccer ball). And Floor coverings used measurements were various thickness vinyl, laminate(or ply-wood) floor. Especially vinyl floor coverings were very effective method to reduce floor impact.

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수음실 잔향시간 변화에 따른 중량 충격음 레벨 특성 - 실험실 환경을 중심으로 - (Floor Impact Sound Pressure Level Characteristics by the Change of Reverberation Time in Mock-up Test Rooms)

  • 정정호;이병권;연준오;전진용
    • 한국소음진동공학회논문집
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    • 제24권4호
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    • pp.339-347
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    • 2014
  • Floor impact sound in high-rise apartment building became one of social problems. A lot of civil complaints on floor impact sound occur continuously and the number of disputes between neighbors in small and aged apartment buildings is increasing. Interests on heavy-weight impact sound pressure level measurement and evaluation method is increased. Previous study reported that heavy-weight impact sound level was changed by the sound field condition of receiving reverberation chamber. In this study, heavy-weight impact sound pressure level change by the receiving sound field condition was measured in standard test facility and mock-up test room. These two experimental conditions were designed to simulate averaged living room of common apartment units. By the change of sound absorption power in receiving room, heavy-weight impact sound pressure level in most of frequency bands were changed in standard test facility and mock-up room. Normalized maximum sound pressure level regulated in ISO 16032 showed wider range of heavy/soft impact sound pressure level. Heavy/soft impact sound pressure level change was became smaller by the application of standardized maximum sound pressure level and ISO/CD 10140-3 Amd 2 method. In the case of standardized maximum sound pressure level, absolute sound pressure level changed. From these results, receiving sound field correction method regulated in ISO/CD 10140-3 Amd 2 is needed for the precision measurement and evaluation of heavy-weight impact sound.

바닥충격음레벨 영향요인 분석 (An Analysis of the Influence Factors of Floor Impact Sound Levels)

  • 김경우;최현중;양관섭;이승언
    • 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.

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중량 바닥충격음 충격원의 종류 및 위치에 따른 수음실 음압레벨 변화 (Deviation of sound pressure level in receiving room according to the heavy-weight floor impact sources and it's positions)

  • 주문기;한명호;오양기
    • KIEAE Journal
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    • 제9권4호
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    • pp.23-28
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    • 2009
  • Standard sound source currently used in heavy-weight floor impact sounds that cause many social problems has excessive low-frequency energy within a range from 63 Hz to 125 Hz, and is difficult to evaluate and measure. To solve these problems, studies are widely performed using a new impact source, the impact ball. In this study, the sound fields in a receiving room were compared and analyzed according to the current impact source, the bang machine, and the impact ball. And deviation of sound pressure level according to the impact source positions were compared. In case of impact ball, the sound pressure level was lower at 63 Hz and below and higher at 125 Hz and above. The same trend was observed at the low-frequency range on the horizontal and vertical planes, regardless of the type of the impact source, which showed the influence of the room mode. There was a problem with the variations in the sound pressure level according to the size or shape of the receiving room. And it also shows that change of source positions may effect the single number rating scheme.

벽식구조 표준시험동에서 중량충격음장에 관한 연구 (Investigation of the heavy-weight floor impact sound field in a testing building with bearing wall structure)

  • 유승엽;이신영;전진용
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 춘계학술대회논문집
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    • pp.969-973
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    • 2007
  • The heavy-weight floor impact sound field of the receiving room in a testing building with bearing wall structure was investigated using bang machine and impact ball. The sound field was investigated through the impact sound pressure level distribution by the field measurement and computational analysis. Predicted sound field using the computational analysis agree with measurement result in the low frequency band. Result shows that standard deviations of the single number rating value are about 2dB in each impact source. Particularly, impact sound pressure level at 120cm height in 63Hz octave band was 5dB lower than spatial averaging value. It was found that receiving positions in the ministry of construction and transportation notice should be reconsidered.

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강재프레임 모듈러주택의 바닥충격음 성능평가 (Performance Evaluation of the Floor Impact Sound Insulation in Steel Framed Modular House)

  • 천영수;방종대;김갑득;유송이
    • 토지주택연구
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    • 제5권2호
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    • pp.81-89
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    • 2014
  • 이 논문에서는 최근 관심을 모으고 있는 강재프레임 모듈러주택의 건식 바닥시스템을 대상으로 바닥충격음 차단성능을 확보하기 위하여 시도된 다양한 바닥구조의 실험결과에 대하여 제시하고 있다. 실험결과, 단위모듈 건식온돌 바닥구조는 완충구조로서 액체몰을 사용한 바닥구조 D31(D32)를 사용하는 조건에서 경량충격음의 경우 주택건설기준 등에 관한 규정에서 정하고 있는 바닥충격음 차단성능의 1등급 수준의 확보가 가능하고, 중량충격음의 경우는 바닥충격음 차단성능의 최저등급이기는 하나 기본적인 성능의 확보가 가능한 것으로 평가되었다.

바닥충격음 측정 및 차음 평가의 방향 (Improvement of Floor Impact Noise Measurement and Method for Rating Floor Impact Noise Isolation Performance)

  • 정정호;정영;서상호;송희수;전진용
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 추계학술대회논문집
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    • pp.269-274
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    • 2004
  • The aims of this study were to Investigate the floor impact noise isolation performance of floating floor with isolation materials and propose the improvement direction of floor impact noise measurement method and evaluation classes using impact ball. Reduction of light-weight impact sound pressure level can be achieved by the finishing materials, such as vinyl finishing material and wooden flooring with isolation materials. Floor impact noise Isolation material which satisfy the properties of the floor impact noise isolation materials cause resonance in the low frequency band and worsen heavy-weight impact sound pressure level. Heavy-weight impact sound level can be reduced by using noise reduction flooring, ceiling and increase of slab thickness. Strong impact force in low frequency bang below 63Hz of bang machine is not similar to human impact source and causes some problem in evaluating heavy-weight impact noise but heavy-weight impact noise measurement and evolution using impact ball which is very similar to human impact is more reliable than bang machine. Correction value on the background noise and sensitivity of residents should be considered on the floor impact noise evaluation classes.

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완충재의 종류에 따른 공동주택 바닥충격음 차단성능에 관한 실험연구 (An Experiment Study on Floor-Impact Sound Insulation by Resilient Materials in Apartment Buildings)

  • 윤세철;오종민
    • 환경영향평가
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    • 제14권4호
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    • pp.217-225
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    • 2005
  • In apartment buildings, floor-impact sound has bean regarded as the major source which induces complaints from residents. It is mainly due to the use of light-weight structures. The vibration produced by impact on one part of an apartment building would travel as far as the other parts of structure with a little alleviation. As a result, the impact sound from upstairs has been regarded as a main source of noise causing discontentment among occupants. This study was carried out to measure the floor-impact sound levels and evaluate the insulation performance of floor-impact sound for nine apartment buildings. The floor-impact sound levels were measured for twenty-five On-dol floor structures and various factors which influence the floor-impact sound were analyzed.