• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 춘계학술대회논문집
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• pp.253-258
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• 2001

Floor impact noises in apartment buildings have been investigated as they are most annoying in living environment. Several experiments were undertaken to compare perceived noisiness of floor impact noises generated by bang and tapping machine along with children's jumping and running. Results show that bang noise is more annoying than tapping noise and floor impact noise generated by children is less annoying than the noise generated by machine. The floor impact noise generated by children's jumping and running corresponds well with the bang-machine noise in terms of loudness, unbiased annoyance, ${\Phi}$$\_$0/ and IACC. The noise generated by children is somewhat different from machine noise; in spatial impression the real noise is similar to tapping-machine noise but is less annoying that the machine noises.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.932-937
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• 2003

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 accupants. This study was carried out to measure the floor-impact sound levels and evaluate the insulation performance of floor-impact sound for seven apartment buildings. The floor-impact sound levels were measured for seventeen On-dol floor structures and various factors which influence the floor-impact sound were analyzed.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.665-670
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• 2002

Pleasantness or quietness becomes one of the most important factors for residential designs recently. Especially for apartments, the noise generated by falling objects becomes a sensitive issue these days. To overcome the problem of the impact noise in apartments, the floor design has been changed. To reduce the transmissibility of the noise, composite floor structures are devised and implemented for the construction of apartments. In this paper, the noise reduction performance of a composite floor plate with holes is analyzed. Computational modelings for the structures are developed and its performance is evaluated by using the finite element method. The results show that the noise can be well reduced with the multi-layer composite floor plates with holes.

• 한국음향학회지
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• 제22권2호
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• pp.88-95
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• 2003

본 논문에서는 바닥충격음의 감성적 상하한치를 기준으로 바닥충격음의 감성적 평가등급을 설정하기 위하여 바닥충격음 레벨에 따른 피험자의 주관적 반응을 현장 청감실험을 통하여 조사하였다. 표준 바닥충격원인 중량, 경량 충격음과 현재 일본에서 신 중량충격원으로 제안되고 있는 고무공충격음, 그리고 실제 충격음 (Jumping)을 대상으로 청감실험을 실시하였으며 청감실험에 사용된 주관적 반응의 평가척도로는 일본 건축학회에서 활용되고 있는 3개의 평가척도와 소음평가어휘를 활용한 평가척도를 사용하였다. 청감실험 결과, 바닥충격음 레벨에 따른 주관적 반응의 관계는 1차 회귀식으로 나타났으며, 감성적 하한치가 중량충격음의 경우 역A특성 가중 바닥충격음 레벨 (L/sub i, Fmax, AW/)이 46㏈, 경량충격음의 경우 역A특성 가중 규준화 바닥충격음 레벨 (L'/sub n, AW/)이 56㏈로 나타났다. 최종적으로 청감실험 결과에서 도출된 감성적 하한치의 기준으로 총 3등급의 평가등급이 설정되었다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 추계학술대회논문집
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• pp.439-440
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• 2008

Five floor coverings were tested with three different types of floor structures in the standard test building in order to evaluate the effectiveness of the floor impact sound reduction. The level of floor impact sound reduction is influenced by not only the types of floor coverings but interrelationship between the floor coverings and floor structures. From the tests, it was found that floor coverings were effective in reducing the floor impact sound using the light impact source. In addition, proper mixtures of the floor structure and the floor covering have shown effectiveness to a certain extent in reducing the floor impact sound using the heavy impact source.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 춘계학술대회 논문집
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• pp.697-698
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• 2012

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.808-811
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• 2005

To use the impact ball as a new standard floor impact source, the objective and subjective properties of the impact bali were investigated. The results showed that not only the objective properties of the impact ball such as the Impact force exposure level, mechanical impedance but also the psychological parameters were more similar to those of the human impact than the bang machine. In addition, most of the subjects chose the impact bail sound as the most similar sound to the human impact sound in the auditory experiment.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 춘계학술대회 논문집
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• pp.238-243
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• 2011

This study compared Kd, loss factor and thickness of floor impact isolator by loading/unloading heat treatment with results by continuous loading treatment and checked problem and improvement method of heat treatment condition for the long-term stability evaluation of the floor impact isolation. As the results, it is required the change of heat treatment condition unloading now to loading as actual weigh on the floor impact isolator.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.950-953
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• 2005

Floor impact sounds from two different floor systems were measured. One of the two floor systems is a dry floor system (with 150mm concrete slab) and the other is a standard floor system (210mm concrete slab). Real impact sources such as jumping and running of children were used as well as standard impact sources (bang machine, impact ball and tapping machine) to evaluate sound Isolation of the two floor systems. Subjective evaluations of the floor impact sound isolation performance for the two systems were also conducted by the methods of 3 scales & 9 categories, paired comparison and semantic differentials. Measurement results indicate that floor impact sound isolation performance of the dry floor was better than that of standard floor in both cases of real and standard impact sources. The subjects in auditory experiments also evaluated the dry floor as a better sound isolation system.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.287-290
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• 2007

In this study, the effect of temporal variation of IACC on subjective response to heavy-weight floor impact noise generated by impact ball was investigated. Subjective evaluation was conducted to investigate the effect of temporal variation of IACC on perception of heavy-weight floor impact noise using paired comparison test. The results showed that the effects of SPL and temporal variation of IACC on the annoyance of heavy-weight impact noises were independent and the contribution of SPL was much larger than that of temporal variation of IACC. It was also found that the effect of IACC is larger than temporal variation of IACC comparing to previous study.