Numerical Modelling of the Sound Field Near a Tall Building With Balconies Near a Road

Hothersall, David; Horoshenkov, Kirill V.; Mercy, S.E.

doi:10.1006/jsvi.1996.0584

Cited by 69 publications

(65 citation statements)

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“…They found that the balcony ceiling was the most appropriate location for the installation of the artificial sound absorption, in order to improve the broadband insertion loss. This conclusion is similar to that of Hothersall et al [46]. However, the side walls were found to be the second best location for such installation.…”

Section: Balconiessupporting

confidence: 91%

“…The absorption used was a 15 mm thick fibrous material. Their results are basically in-line with those of Hothersall et al [46], and illustrate that the balcony ceiling and the rear wall are the most effective locations for installing sound absorption. Their results also show that the insertion loss of their model balcony, when installed with sound absorption, ranged from 4 to 7 dB.…”

Section: Balconiessupporting

confidence: 87%

“…Although May [40] indicated that sound absorption (NRC 0.80) could help, the resulting balcony insertion losses in his study were not known, as the associated balconies could not be removed. Hothersall et al [46] has carried out a two-dimensional simulation to study the effect of sound absorption on the insertion loss of balconies on a multi-storey building next to a road. The absorption adopted was a 100 mm thick fibrous material, with a flow resistance of 20,000 Ns·m −4 .…”

Section: Balconiesmentioning

confidence: 99%

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A Review on Natural Ventilation-enabling Façade Noise Control Devices for Congested High-Rise Cities

Tang

2017

Applied Sciences

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Abstract:This review summarizes the current status of the research and development of natural ventilation-enabling noise control devices for use on the façades of high-rise residential buildings in congested cities. These devices are important for a sustainable urbanized city, as they are supposed to offer good acoustical protection to citizens, allowing for an acceptable level of natural ventilation inside residential units; energy for mechanical ventilation can then be saved. From the information presented in the existing literature, it is concluded that protrusive devices, such as lintels and balconies, are not effective noise screening devices, even if they are installed with sound absorbers and/or reflectors, under the effect of city reverberation. On the contrary, plenum windows and similar structures, which are plenum structures with a staggered air inlet and outlet, are interesting alternatives that are worth rigorous considerations.

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Section: Balconiessupporting

confidence: 91%

Section: Balconiessupporting

confidence: 87%

Section: Balconiesmentioning

confidence: 99%

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A Review on Natural Ventilation-enabling Façade Noise Control Devices for Congested High-Rise Cities

Tang

2017

Applied Sciences

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“…[4][5][6][7] For example, when barriers are placed on opposite sides of a noise source, their performance deteriorates markedly; 8 however, this drawback can be significantly eliminated by the implementation of inhomogeneous boundaries on the barrier surfaces. 5 In addition, for a road-side building, the screening effect of a balcony was found to be cancelled due to the reflection from its ceiling; 9 in comparison, ceilings having inhomogeneous boundaries effectively guide the sound energy flux away from the building facade. 6 In this paper, such inhomogeneous boundaries are systematically discussed.…”

Section: Introductionmentioning

confidence: 99%

Acoustic performance of boundaries having constant phase gradient

Wang

et al. 2016

The Journal of the Acoustical Society of America

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In this paper, inhomogeneous boundaries having constant phase gradient are investigated. In principle, such a theoretically proposed boundary is dispersionless. In practice, however, when the boundary is realized by a subwavelength-structured tubes array, the impedance discretization brings about sub-reflections at high frequencies. Moreover, determined by the longest duct in the array, a realized boundary is impractically thick. Therefore, a finite-thickness boundary is further proposed by truncating and periodizing the tubes in the array. In this paper, the theoretical analysis agrees well with the numerical simulations. By appropriately choosing its phase gradient and target frequency, the finite-thickness boundaries have potential applications in noise control.

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“…The sound fields in such balconies and their noise-shielding effects have been investigated. [1][2][3][4][5][6][7] Several studies 1,4,5 have dealt with improving noise shielding by treating balcony surfaces with absorbent materials. However, in practical use, absorbent materials such as glass wool have long-term durability issues.…”

Section: Introductionmentioning

confidence: 99%

Full-scale tests of reflective noise-reducing devices for balconies on high-rise buildings

Ishizuka¹,

Fujiwara²

2013

The Journal of the Acoustical Society of America

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In the present report, the noise-shielding efficiency of balconies with ceiling-mounted reflectors on the façades of high-rise buildings is examined through full-scale field measurements. The reflectors are designed to reflect direct and diffracted waves incident on the balcony ceiling outside the balcony. Field measurements are conducted to investigate the performance of the reflectors on intermediate floors of a high-rise dwelling adjacent to a railway. The reflectors reduce railway noise by approximately 5 dB, in A-weighted sound pressure level, compared to an ordinary balcony. The noise-shielding efficiency of a balcony equipped with reflectors is greater than that of an absorbing balcony.

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Numerical Modelling of the Sound Field Near a Tall Building With Balconies Near a Road

Cited by 69 publications

References 0 publications

A Review on Natural Ventilation-enabling Façade Noise Control Devices for Congested High-Rise Cities

A Review on Natural Ventilation-enabling Façade Noise Control Devices for Congested High-Rise Cities

Acoustic performance of boundaries having constant phase gradient

Full-scale tests of reflective noise-reducing devices for balconies on high-rise buildings

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