Floor Impact Sound Level Distribution in Upper and Lower Units of an Apartment Based on Flanking Transmission by the Impact of a Rubber Ball

Lee, Songmi; Kim, Jeonghun; Kim, Suhong; Song, Hansol; Ryu, Jongkwan

doi:10.5050/ksnve.2021.31.5.574

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…This effect has been empirically proven by [23,24], and aligns well with observations in concrete student accommodations where unit boxes are arranged along one side of a corridor [25]. However, in more complex wall-slab multifamily housing, the attenuation effect diminishes or becomes less perceptible with increasing distance from the impact source [9].…”

Section: Distance Attenuation Of Vibration In Wall-slab Structuresupporting

confidence: 77%

“…Due to the characteristic of having many walls that act as mediums for vibration transmission, the vulnerability to noise in wall-slab buildings includes not only the issue of noise level but also the problem related to the propagation of noise, which makes it difficult to locate the source of the noise. For residents of multifamily housing, relieving acoustic annoyance through dialogue with noise-producing residents is challenging when the noise source remains unidentified [9]. The consistent social demand to identify the noise source in areas heavily supplied with wall-slab multifamily housing implies a need for attention to the propagation of floor impacts [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Periodic Materials on Distance Attenuation in Wall–Slab Structures: An Experiment

Cho,

Song,

Kwon

et al. 2024

Buildings

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This research examines the application of periodic materials in wall–slab structures to mitigate impact noise and vibration propagation, a prevalent issue in multifamily housing. Traditional methods, such as floating floors, have proven insufficient in addressing low-frequency impact noises and in facilitating the identification of noise origins, leading to increased resident annoyance. Periodic materials, known for their effectiveness in controlling plane waves in civil engineering, were applied to the intermediate slab of a wall–slab experimental setup. The research involved assessing the attenuation of noise and vibration over distance before and after the application of periodic materials by measuring indoor sound pressure levels and the natural vibration amplitude of the structure’s members upon impact. The results showed that periodic materials not only facilitated distance attenuation but also significantly diminished noise and vibration throughout the structure, without the side effects of vibration amplification seen in prior civil engineering applications. This indicates a practical advancement in using these materials, offering a novel approach to sound insulation and enabling more precise impact source localization. Ultimately, this study contributes to improving urban living by suggesting a method to enhance acoustic comfort in multifamily housing, underlining the importance of further exploration in architectural applications of periodic materials.

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Section: Distance Attenuation Of Vibration In Wall-slab Structuresupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Effects of Periodic Materials on Distance Attenuation in Wall–Slab Structures: An Experiment

Cho,

Song,

Kwon

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

Investigation of source ambiguity of floor noises in a box-frame concrete building from the perspective of junction attenuations: A real case field experiment

Cho,

Song,

Park

et al. 2024

Indoor and Built Environment

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This study investigated impact source ambiguity in box-frame multifamily buildings, prevalent in densely populated areas, by examining the transmission of heavy-impact noise and its relationship with junction attenuations across five floors. Contrary to the decline in noise levels with increased distance from the impact source, our findings uncover an intriguing deviation in the behaviour of vibration response levels. Surprisingly, vibrations are often intensified, rather than diminished, with distance. Notably, upon examining each room, instances where non-structural or thin concrete walls exhibited the highest vibration responses were frequently observed. Such instances were particularly prevalent in rooms not directly adjacent to the impact source. This trend markedly impedes residents’ ability to pinpoint the origin location of impact noises. This study reveals an unexpected weakening and reversal of distance attenuation in vibration, linked to the increasing number of valid flanking paths as the junction distance grows. The findings suggest that increasing slab thickness for noise insulation may unintentionally complicate source identification due to diminished junction attenuation in thicker horizontal components compared to vertical ones. To enhance acoustic comfort in such housing, this study recommends minimizing valid flanking paths through improved junction design, addressing an often-overlooked issue of source ambiguity of floor noises.

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Acoustical Characteristics of the Floor Impact Sound Transmitted to the Upper and Lower Floors by a Rubber Ball in Apartment: Effect of Excitation, Receiving Position, and Rubber Ball Dropping Height

Eom¹,

Lee²,

Kim³

et al. 2023

KSNVE

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Floor Impact Sound Level Distribution in Upper and Lower Units of an Apartment Based on Flanking Transmission by the Impact of a Rubber Ball

Cited by 3 publications

References 3 publications

Effects of Periodic Materials on Distance Attenuation in Wall–Slab Structures: An Experiment

Effects of Periodic Materials on Distance Attenuation in Wall–Slab Structures: An Experiment

Investigation of source ambiguity of floor noises in a box-frame concrete building from the perspective of junction attenuations: A real case field experiment

Acoustical Characteristics of the Floor Impact Sound Transmitted to the Upper and Lower Floors by a Rubber Ball in Apartment: Effect of Excitation, Receiving Position, and Rubber Ball Dropping Height

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