Analysis Effects of Perforated Gypsum Board Ceiling Structure for Floor Impact Sound Reduction

Shin, Hye Kyung; Kim, Kyoung Woo

doi:10.5050/ksnve.2019.29.4.511

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…Lee et al [3] devised and applied a wall-supported ceiling system that was not connected to the bottom of the slab to reduce the vibrations transmitted from the slab to the ceiling finishing material. Shin et al [4] reduced the weight impact sound by drilling a hole in a part of the ceiling finishing gypsum board to improve the low-frequency resonance generated in the interior space of the ceiling owing to floor impact. In addition, a previous study [5] applied glass wool density to improve the sound absorption performance inside the ceiling.…”

Section: Reduction Of Floor Impact Sound Through Ceilingmentioning

confidence: 99%

Floor-Impact Sound Insulation Performance of Acoustic Metamaterial Ceiling

Jeong,

Kwak,

Park

et al. 2024

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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Floor impact noise in apartment houses is a noise source that needs to be reduced first among the noise generated in residential spaces. Among the floor impact sound reduction methods, a plan that a downstairs resident can apply to his or her house is to improve the ceiling structure. In order to improve the performance of the floor impact sound isolation of the ceiling, a vibration-isolation hanger, sound-absorbing material and sound-insulating material were applied. In this study, a structure that effectively reduces the main frequency of floor impact sound is periodically arranged in the ceiling of an apartment building, and an acoustic metamaterial made of lightweight material is applied and compared in laboratory conditions. The light-weight impact sound and the rubber ball impact sound were measured and compared, and it was confirmed that the floor impact sound was reduced when the acoustic metamaterial was applied inside the ceiling.

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Section: Reduction Of Floor Impact Sound Through Ceilingmentioning

confidence: 99%

Floor-Impact Sound Insulation Performance of Acoustic Metamaterial Ceiling

Jeong,

Kwak,

Park

et al. 2024

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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“…The progress of developing ceiling structures in receiving rooms to reduce noise from floor impacts is also underway [21][22][23][24][25][26]. This involves using internal acoustic materials to minimize the amplification of impact noises to the room below due to the influence of the air layer within the ceiling and a ceiling-less design to minimize the transmission of impact noises through the ceiling.…”

Section: Introductionmentioning

confidence: 99%

Impact Sound Reduction Performances of Additional Floor Mats for the Retrofitting of an Existing Apartment Building in Accordance with Test-Bed Conditions

Kim,

Moon,

Yeon

2024

Applied Sciences

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Floor mats are commonly used to improve the impact sound performance of existing homes, but actual impact sound reductions do not consistently appear, as they depend on the test-bed conditions used to determine impact sound performance. Therefore, this study evaluated the effects of the environmental conditions of the test bed on the impact sound reduction performances of different floor mats. The Korean industrial standard KS F 2865 specifies the measurement method in the test room and sets the thickness range of the available target floor structure to bare slabs with thicknesses ranging from 120 mm to 210 mm. The evaluation method is ∆L, which is the difference in standardized impact sound levels before and after the installation of the floor finishing material. In this study, a total of eight types of floor mats were tested in four different test beds according to KS F 2865. The impact sources used were tapping, bang machines, and a rubber ball, and we used these sources to consider both light-weight and heavy-weight impact sounds. The results were derived as the impact sound reduction performance for each frequency band and a single-number quantity. The results showed that light impact sound had a similar minimum reduction characteristic of at least 38 dB, regardless of the floor structure on which the mat was installed. However, the heavy-weight impact sound showed different tendencies depending on the floor mat and the characteristics of the floor structure of the test bed when a bang machine and a rubber ball were used. In particular, the reduction achieved by the bang machine showed less than half the tendency of the reduction by the rubber ball, and the tendency of the heavy-weight impact sound was shown to be reducible depending on how the floor mat was maintained, but the reductions differed depending on the test bed. The reductions were larger in the box-type test room than in the real-life-type test room, and among the box-type test rooms, the one with a thicker bare slab showed a relatively larger reduction. In addition, the reliability of the measurement results was evaluated through a correlation analysis between the single-number quantities depending on the thicknesses of the bare slabs of the test beds.

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“…To avoid this phenomenon, a ceiling structure with no hanging bolts or resonant sound absorber has been suggested [19]. Recently, the use of a multi-perforated gypsum board instead of a normal gypsum board could contribute to improving isolating performances of heavy-weight impact noise by 1-2 dB [25]. However, there was no practical application case using a multi-perforated gypsum board ceiling to reduce floor impact noises in an actual living condition with a subjective response test.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Retrofit Approach of an Apartment Living Room Using Multi-Perforated Gypsum Boards in Terms of Heavy-Weight Impact Sounds

Kim

2022

Sustainability

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In this study, the effects of multi-perforated gypsum boards on floor impact noises were investigated in a box-type test building and an actual apartment building. In a box-type test building with 150 mm thick slab, various design factors such as hole pattern, hole size, opening ratio, backing, or finishing materials were considered. Heavy-weight impact sources of bang machine and rubber ball were employed. The test procedure followed KS F 2810-2, and then, a single number rating was derived in accordance with KS F 2863-2. As a result, reduction of heavy-weight impact noise by applying multi-perforated gypsum boards as a ceiling material was expected maximumly up to 3 dB for bang machine and 5 dB for rubber ball. Regarding the reduction of floor impact sounds at frequencies above 125 Hz, the installed area of the employed multi-perforated gypsum board was shown as the most dominant factor. Then, an in situ investigation using standard impact sources and five children was carried out in an actual living space of an actual apartment dwelling unit. Comparing before and after installation of multi-perforated gypsum board, 1–2 dB of heavy-weight impact noises was reduced. In addition, subjective impressions of the reduced impact noise were discussed based on the field questionnaire survey using actual children’s running situations.

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Analysis Effects of Perforated Gypsum Board Ceiling Structure for Floor Impact Sound Reduction

Cited by 6 publications

References 3 publications

Floor-Impact Sound Insulation Performance of Acoustic Metamaterial Ceiling

Floor-Impact Sound Insulation Performance of Acoustic Metamaterial Ceiling

Impact Sound Reduction Performances of Additional Floor Mats for the Retrofitting of an Existing Apartment Building in Accordance with Test-Bed Conditions

Acoustic Retrofit Approach of an Apartment Living Room Using Multi-Perforated Gypsum Boards in Terms of Heavy-Weight Impact Sounds

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