아동행동에 따른 중량바닥충격음 레벨 비교

한찬훈 ( Haan Chan-hoon ),김건수 ( Kim Geon-su ) 충북대학교 건설기술연구소 2023 建設技術論文集 Vol.42 No.2

본 연구의 목적은 공동주택에서 발생하는 주요한 층간소음 원인인 아동의 행동에 따른 바닥충격음을 조사하는 것이다. 현재 뱅머신과 고무공충격원dl 바닥충굑음의 중량표준바닥충격음원으로 사용되고 있다. 따라서, 아동의 행동에 따른 실제바닥충격음과 표준바닥충격음원으로 측정된 소음레벨과 비교함으로서, 보다 현실적이고 정확한 평가방법을 제시하고자 한다. 이를 위하여 경기도 A시의 E단지내 2가구를 선정한 후 7세 24Kg 이상인 남자아이를 대상으로 현장실험을 실시하였다. 모든 측정은 KS F2810-1과 KS F2810-2에 따른 바닥충격음 차단성능 현장측정 방법에 따라서 수행되었다. 현장 층간소음 실험시 아동행동유형은 뛸 때, 걸을 때, 뛰어 내릴 때, 뒹굴 때 등 4가지로 분류하였으며, 이 분류한 행동유형을 세부적으로 속도별, 걸음의 유형별, 높이별, 지속시간별로 나누어 실험하였다. 실험 결과 중량충격음과 비교했을 때 뛸 때와 뒹굴 때는 저주파수에서 5dB이상 차이나는 반면, 뛰어내릴 때는 5dB이하 차이나는 것을 통해 뛰어 내릴 때는 표준중량충격원과 비슷하지만 나머지 행동유형은 더 낮은 저주파수대역의 충격음원이 필요하다고 생각한다. 따라서 아이의 행동을 세밀하게 분석한 뒤 더 폭넓은 중량충격원에 대한 연구가 필요하다. The present study aims to investigate the real floor impact noises caused by children’s various actions inside the apartment housing. Currently, bang machine and impact ball are used as the standard heavy-weight floor impact sound sources, to evaluate the floor impact noises. So, measured floor impact noise data obtained by both children and reference sound sources could be very important for the more accurate and reliable evaluation of the current floor impact noises. In order to this, two vertically connected households were selected for the field acoustic experiments and a child of 7 years old participated in the measurements as a subject. All the acoustic field measurements were carried out following the standards (KS F2810-1 and KS F2810-2). Four typical behaviors of children were acted in a living room including walking, running, jumping and rolling on the floor. As a result, it was found that the measured noise levels by child’s behaviors are different from the noise levels from standard floor impact sound sources from 1dB up to 5dB when child ran and rolled. Also, it was revealed that standard floor impact sound sources make lower sound levels than the noise levels by child’s jumping at 64Hz where, the critical heavy-weight floor impact sound frequency. Thus, it could be concluded that more reliable floor impact sound sources should be considered which can represent the real condition of floor impact noises occurrence in current apartments

중량충격원에 따른 콘크리트 바닥판의 차음특성 분석 및 평가에 관한 연구

유승엽(Yoo, Seung-Yup),연준오(Yeon, Jun-Oh),전진용(Jeon, Jin-Yong) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.10

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.

건식이중바닥구조와 하부 천장구조의 조합에 따른 바닥충격음 평가

연준오(Yeon, Jun-Oh),김명준(Kim, Myung-Jun),김경우(Kim, Kyoung-Woo),양관섭(Yang, Kwan-Seop) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.3

In the present study, floor impact sound reductions by floor structure and ceiling were investigated. Upper layer of a dry double floating floor was made of recycled materials. Also, steel as well wooden beams were applied to the dry double floating floor then impact sound insulations of them were measured. It was found that light-weight impact sound insulation of the floor with steel beam was improved by 4 dB (L"n,AW) compared to the floor with wooden beam. Moreover, heavy-weight impact sound insulations of the floor with steel beam were enhanced by 3 dB and 4 dB (L"i,Fmax,AW), respectively using bang machine and rubber ball. As a second experiment, the impacts of ceiling aperture on the floor impact sounds were measured while the steel beams were installed to the dry double floating floor. The light-weight impact sound insulation was found to be best, 32 dB when apertures were applied to perimeters of coffered ceiling. The heavy-weight impact sound insulation measured by the bang machine was 48 dB when the apertures were installed to moldings. In contrast, two experimental cases without any aperture and apertures on perimeters of the coffered ceiling showed best heavy-weight impact sound insulations of the rubber ball (40 dB). Lastly, influences of impact positions on single number ratings were investigated. It was observed that there was not a significant relationship between impact positions and single number ratings.

표준중량충격원을 이용한 건축물의 바닥 충격음 차단성능 측정불확도 평가

이용봉,권혁제,김창환,조만희,김항,정성수 한국음향학회 2023 韓國音響學會誌 Vol.42 No.2

In this paper, a method for evaluating the measurement uncertainty is proposed when measuring of floor impact sound insulation of buildings using standard heavy impact source. In addition to the effect of repeated measurements, several other factors such as measurement location, impact location, equipment used for sound pressure measurement, and heavy impact source, were considered. A mathematical model for the average maximum impact sound level and the uncertainty evaluation method for each factor were proposed. The present proposed method was applied to measurement results to evaluate the average maximum impact sound pressure level and the measurement uncertainty. 본 논문은 표준 중량충격원을 이용한 건축물의 바닥충격음 차단성능을 측정하는 경우 측정불확도를 평가하는 방법을 다루었다. 반복 측정의 영향 이외에도 측정 위치의 영향, 가진 위치의 영향, 음압측정에 사용된 장비의 영향및 충격원의 영향 등을 고려하였다. 평균 최대 바닥충격음 레벨 측정의 수학적 모델을 제시하고 요인별 불확도 평가방법을 제안하였으며, 제안한 방법을 실제 측정 결과에 적용하여 평균 최대 바닥충격음 레벨 및 측정불확도를 평가하였다.

수음실 잔향 시간변화에 따른 바닥충격음레벨 특성

정정호(Jeong, Jeong Ho),김정욱(Kim, Jeong Uk),정재군(Jeong, Jae Gun) 한국소음진동공학회 2013 한국소음진동공학회 논문집 Vol.23 No.3

Field measurement method of heavy/soft impact sound pressure level which is regulated in JIS and ISO has been using in Korea, Japan and Canada. It is reported that heavy/soft impact sound pressure level was varied by the sound field condition of receiving room such as sound absorption power and room volume. In this study, it is checked that heavy/soft impact sound pressure level was affected by the receiving sound field condition. Rubber ball and bang machine sound pressure level was measured in the vertically connected reverberation chamber. In oder to check the effect of receiving sound field on heavy/soft impact sound pressure, sound absorption power was changed with polyester sound absorption blankets with air space and glass wool. The reverberation time at 1 kHz band was changed from 10 s to 0.2 s by sound absorption material. Rubber ball sound pressure level measured without sound absorption material was 58 dB in $L_{i,Fmax,AW}$, but the level was 46 dB with sound absorption treatment. From this result, it is confirmed that sound field correction method is needed in the heavy/soft impact sound pressure level measurement method using bang machine and rubber ball.

중량충격원별 바닥충격음 레벨 저감량의 비교 분석

신훈(Shin Hoon),백건종(Back Geon-Jong),송민정(Song Min-Jeong),국찬(Kook Chan),장길수(Jang Gil-Soo) 한국건축친환경설비학회 2008 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-

The evaluating Korean industrial standard(KS) for the reduction in heavy weight impact sound pressure level is not established yet. It is because that the heavy weight impact sound pressure level is largely dependent on stiffness of structure as well as resilient layer. In this study, the reduction characteristics of floor impact sound pressure levels due to two heavy weight impact sources were analyzed. As results, there are big differences in level reduction in many frequency bands and single-number quantity between bang machine and impact ball.

건식이중바닥구조의 중량충격음에 대한 실험적 평가

연준오(Yeon, Junoh),김경우(Kim, Kyoungwoo),최현중(Choi, Hyunjuong),양관섭(Yang, Kwanseop),김경호(Kim, Kyungho) 한국소음진동공학회 2013 한국소음진동공학회 논문집 Vol.23 No.1

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.

유한 요소법을 이용한 나 슬래브의 2차원 바닥 충격진동 해석

서상호(Seo, Sang-Ho),전진용(Jeon, Jin-Yong) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.5

The relationship between floor impact sound and vibration has been studied by field measurements, and the vibration modal characteristics have been analyzed. Vibration levels impacted by a standard heavy-weight impact source have been predicted according to the main design parameters using finite element method. Experimental results show that the dominant frequencies of the heavy impact sounds range below 100 Hz and that they are coincident with natural frequencies of the concrete slab. In addition, simple 2-dimensional finite element models are proposed to substitute 2 types of 3-dimensional models of complicated floor structural slabs those by The analytical result shows that the natural frequencies from first to fifth mode well correspond to those by experiments with an error of less than $12\%$, and acceleration peak value iscoincident with an error of less than $2\%$. Using the finite element model. vibration levels areestimated according to the design Parameters, slab thickness, compressive strength, and as a result, the thickness is revealed as effective to increase natural frequencies by $20\~30\%$ and to reduce the vibration level by 3$\~$4 dB per 30 mm of extra thickness.

바닥충격음 저감을 위한 통기성 천장공법 개발

김경호(Kim, Kyung-Ho),류종관(Ryu, Jong-Kwan),전진용(Jeon, Jin-Yong) 한국건축친환경설비학회 2015 한국건축친환경설비학회 논문집 Vol.9 No.1

This study investigated the increase of floor impact sound caused by ceiling air space in test building. Firstly, the change in floor impact sound with and without ceiling air-space was measured. Noise reduction effect of perforated ceiling systems and glass wool at ceiling area was also investigated. It was expected that perforated ceiling systems could reduce air-spring effect in ceiling space. As a result, ceiling air space caused increasement of floor heavy-weight impact sound about 2~4 dB. On the other hands, perforated ceiling with sound-absorbing materials system could reduced heavy-weight floor impact sound by 3 dB.

바닥충격음 저감이 가능한 천장 공법 개발

김경호(Kim kyungho),김성훈(Kim sunghoon),류종관(Ryu jongkwan),이종인(Lee jongin),김용민(Kim yongmin) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10

According to the advanced study, Increase of ceiling air space could cause increase of floor impact sound by air-spring effect. So in this research, we studied the increase of floor impact sound caused by ceiling air space in apartment buildings. At first, we evaluated the change of floor impact noise in the condition of with or without ceiling air-space. And then we installed perforated ceiling systems and glass wool at ceiling area. we expected that perforated ceiling systems could prevent air-spring effect in ceiling space. As a result , ceiling air space caused increasement of floor heavy impact noise about 2~4dB. But perforated ceiling & sound-absorbing materials system could give us reduction of heavy floor impact noise about 3dB. So this systems could be a good alternative to obey national regulations, because it can reduce heavy impact noise additional to floating floor systems.