The acoustical influence of balcony depth and parapet form: experiments and simulations

Dien, Hany Hossam El; Woloszyn, Philippe

doi:10.1016/j.apacoust.2004.09.004

Cited by 44 publications

(26 citation statements)

References 9 publications

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“…However, the maximum insertion loss found was 2, 4, and 6 dB, for a balcony depth of 1 m, 2 m, and 3 m, respectively, when the front parapet remained vertical [49]. It was also found that an inclined front parapet could result in an additional 0.5 to 4 dB noise attenuation [50]. However, a 3 m deep balcony is by no means common in a congested high-rise city.…”

Section: Balconiesmentioning

confidence: 99%

“…El-Dien and Woloszyn [49,50] studied this using the pyramid tracing method, as well as a scale model, to show how the balcony ceiling's inclination and depth, and the front parapet design, could all affect the overall balcony sound insertion loss. They observed that the balcony insertion loss showed an increasing trend with increasing balcony depth.…”

Section: Balconiesmentioning

confidence: 99%

See 1 more Smart Citation

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: Balconiesmentioning

confidence: 99%

Section: Balconiesmentioning

confidence: 99%

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

Tang

2017

Applied Sciences

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“…The optimal and most practical place to apply absorbing material seemed to be the underside of the balconies. The influence of balcony depth and parapet inclination was studied in 3D on an 8-floor building, both with a ray-tracing method and on a scale model [29]. Increasing balcony width resulted in a somewhat decreased shielding at all floors, because of the increase in reflection on the underside of the upper balcony towards the underlying façade.…”

Section: Balconiesmentioning

confidence: 99%

Parameter study of sound propagation between city canyons with a coupled FDTD-PE model

2006

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A parameter study is performed for the case of two-dimensional sound propagation from a (source) city canyon to a nearby, identical (receiver) city canyon. Focus was on sound pressure levels, relative to the free field, in the shielded canyon. An accurate and efficient coupled FDTD-PE model was applied, exploiting symmetry of the source and receiver canyon. With the proposed calculation method, simulations were necessary in only half the sound propagation domain. The shielding in the receiver canyon in case of a coherent line source was compared to the shielding by an incoherent line source, by means of sound propagation calculations in a number of 2D cross-sections through source and receiver. It was found that the shielding is rather insensitive to the width-height ratio of the canyons. The presence of diffusely reflecting façades and balconies lead to an important increase in shielding compared to flat façades. Rigid façades yield significantly lower shielding compared to partly reflecting façades. Effects of a moving atmosphere were modeled in detail. Shielding decreases significantly in case of downwind sound propagation when comparing to sound propagation in a non-moving atmosphere. Refraction is the most important effect in the latter. In case of upwind sound propagation, turbulent scattering plays an important role and the shielding is similar to the one of a non-moving atmosphere for the parameters used in this paper. The combination of effects, as is shown by some examples, is in general not a simple addition of the separate effects.

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“…El Diem predicted the sound field along high-rise building façades as influenced by the parapet form and balcony depth, giving interesting conclusions that could be taken into account by architects [22] [23]. Naish assessed nine balcony types to provide guidance on optimised acoustic treatment [24].…”

Section: Introductionmentioning

confidence: 99%

The effect of street canyon design on traffic noise exposure along roads

Sánchez

Renterghem

Thomas

et al. 2016

Building and Environment

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Abating road traffic noise pollution is one of the main urban environmental challenges nowadays.However, architects and urbanists take decisions on urban regulations that define the shape of streets and buildings without taking this aspect into account. Furthermore, there is little information about the influence of urban geometry on traffic noise exposure in streets. In this study, the effect of street canyon design on sound pressure level distribution is numerically studied in high detail with the full-wave finite-difference time-domain method (FDTD). The CNOSSOS equivalent source power spectra were used to approach road traffic noise sources along two traffic lanes. Receivers both along the façades and the sidewalks have been considered in 42 cases. Numerical results demonstrate that building shape, street geometry and the presence of street furniture can have a strong impact on people's noise exposure. Building shape can be responsible for variations of up to 7.0dB(A) at pedestrians. Building-façade design can reduce the average exposure at windows with 12.9dB(A). It was further predicted that street geometry can enhance the positive effect of low barriers to 11.3dB(A) along sidewalks. It was therefore concluded that carefully designing building façades and street geometry could improve the sound climate for people living and walking along busy urban streets and should be considered in future urban street design.

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The acoustical influence of balcony depth and parapet form: experiments and simulations

Cited by 44 publications

References 9 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

Parameter study of sound propagation between city canyons with a coupled FDTD-PE model

The effect of street canyon design on traffic noise exposure along roads

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