Insertion losses of balconies on a building façade and the underlying wave interactions

Tang, Shiu Keung; Ho, CP; Tso, Ty Y.

doi:10.1121/1.4883379

Cited by 12 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to the standard ISO 10140-2 2021, 29 the sound transmission loss (TL) of windows is commonly measured using the two-room method, and the sound transmission loss is defined as the ratio of the total incident power P in relative to the total transmitted power P tr as shown below 30 TL¼ 10log 10 P in p tr (10) In this model, the transmitted power is obtained by integrating the transmitted sound intensity with the following equation…”

Section: Sound Transmission Loss and Incident Powermentioning

confidence: 99%

“…By combining ( 15) and ( 11) with (10), sound transmission loss between reverberation rooms can be calculated, as shown in equation ( 16) TL¼ 10log 10 P in, rev p tr (16) When simulating an anechoic room on the receiving side, as shown in Figure 2(b), the incident power on the source side can be expressed as in equation ( 17)…”

Section: Sound Transmission Loss and Incident Powermentioning

confidence: 99%

See 1 more Smart Citation

Sound insulation performance and modal analysis of asymmetrical insulating laminated glass

Zhu,

Wang,

Wang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

Windows are commonly the primary way for noise to enter the building environment. Most windows achieve higher sound insulation targets by simply increasing glass thickness or laminate. However, the glass thickness cannot be increased freely due to the window frame’s limitation. This research selects eleven kinds of asymmetric insulating laminated glass (glass + polyvinyl butyral + glass + air + glass) within 27 mm, which are the typical thicknesses of window frames. The three pieces of glass have equal thicknesses. The half-space acoustics method investigated the acoustic properties and modal behavior of the glass with finite thickness. The results show that when PVB or three glass increases simultaneously, and the sound insulation of each glass can be improved by 0.9∼3.4 dB or 3.7∼21.8 dB at first resonant frequencies, respectively. The glass with the best sound insulation is 7 mm glass + 0.76 mm polyvinyl butyral + 7 mm glass + 5 mm air + 7 mm glass (7 + 0.76 + 7 + 5A + 7 for short). Its sound transmission loss (TL) is 38.5 dB from 125 to 4000 Hz and 16.8 dB in the first resonant frequency (200 Hz). In addition, its first resonant frequency is the highest among eleven kinds of glass, and the number of natural frequencies in the low frequency range is only 9. These findings can provide a basis for designing asymmetric insulating laminated glass to improve the low frequency noise reduction effect effectively.

show abstract

Section: Sound Transmission Loss and Incident Powermentioning

confidence: 99%

Section: Sound Transmission Loss and Incident Powermentioning

confidence: 99%

Sound insulation performance and modal analysis of asymmetrical insulating laminated glass

Zhu,

Wang,

Wang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

show abstract

“…Yapı cephelerinde balkon tasarımı üzerine yapılan konuyla ilgili çok sayıda araştırma, bir cephedeki farklı balkon şekillerinin ölçümlerle ve simülasyonlarla cephenin üzerindeki ses basınç düzeyini büyük oranda azaltabildiğini göstermiştir [14][15][16]. Bu araştırmalar, balkonların cepheye ulaşan gürültü azaltımına sağladığı katkıya bağlı olarak ses basınç düzeylerini incelemiş ve farklı balkon derinlikleri, korkulukları ve balkon alt yüzey eğimlerinin etkisini araştırmışlardır [17,18].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Yapı cephe özellikleri ve yol genişliğinin çevresel gürültü düzeyine etkisinin kentsel yol kesitleri üzerinden incelenmesi

Şimşek

BİLEN

2022

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

The spread of noise in urban areas  The effect of facade features and road widths on the propagation of noise  Effects of parameters affecting noise propagation on street canyon formation Figure A. Three-dimensional model used in the simulations of Atatürk Street Purpose:The aim of this study is to examine the propagation of noise in urban areas, which is one of the most important problems of today's cities, through simulations depending on the changes in parameters that affect the propagation of sound.Theory and Methods: For this purpose; Turkey Eskisehir having an average population, a busy two-lane transportation arteries around the adjacent 7-8 storey Ataturk Avenue is a street where the building was chosen as the case study. In the study, the current physical state of Atatürk Street was animated through the acoustic simulation program (which has an algorithm called "ray tracing" that takes into account the effects of multiple reflections, first and second order diffractions) and the variations created by applying many different facade features and road width applications on the animation. The effect on the formation of the street canyon was evaluated by comparing the variations with the current situation. Results:The results of the study showed that the facade characteristics and different road widths have a significant effect on the propagation of environmental noise in the facade plane and in the entire road section. In this context; Although the presence of console, balcony and parapet in the facade setup and the presence of parapet slope have a negative effect on the ground floor; it has serious positive effects on the upper floors; terraced facades have a great positive effect on the difference in noise level, even though it is partly due to the increased distance between the façade plane and the traffic line; As the facade materials, the bottom of the balcony and the interior of the parapet are covered with sound absorbing equipment, creating a positive effect on all floors; In terms of road widths, it was concluded that the positive effect of different widths was mostly observed at the ground floor level. Conclusion:The outputs presented in this study are considered to be a guide for urban planners and architects in determining the relevant parameters affecting the propagation of sound in existing settled cities and in design decisions to be taken at urban scale.

show abstract

“…Furthermore, the façade design represents a good opportunity to protect dwellings from external noise. [16][17][18][19][20][21][22] Windows often represent the weak element in façade sound insulation and their acoustic performances have been widely studied. [23][24][25][26][27] Acoustic effects of building external shading devices have not been well studied yet, with the exception of a few recent works.…”

Section: Introductionmentioning

confidence: 99%

The use of façade sun shading systems for the reduction of indoor and outdoor sound pressure levels

2019

View full text Add to dashboard Cite

External shading devices are widely used in recent buildings because they reduce the greenhouse effect due to the solar irradiation through transparent surfaces and the glare effects in interiors. The acoustic effects of these devices have not been well investigated in the literature. In this article, we use a bi-dimensional pressure acoustics finite element model of a shading device attached to a building façade, in frequency domain, to analyse the effects both in the indoor and in the outdoor environments. The finite element model was validated with experimental measurements carried out in a semi-anechoic chamber and then extended to an urban scale to evaluate the effect in the reduction of outdoor noise due to traffic. To improve the acoustic effect of the shading device, a sound absorbing material was added to the bottom side of each louvre. Results of the simulations show that external shading devices tend to increase the sound pressure level over the building façade, while the introduction of the sound absorbing material behind each louvre reduces this problem. The dependencies of the sound pressure level reduction to the geometrical factors of the shading device were investigated by means of the finite element model. The installation of louvres on a building façade can affect also the sound pressure level over a façade of a building placed 20 m away, across a road. In this article, both the effect over the façade of the opposite building and the effect over the urban area between the two buildings are analysed.

show abstract

Insertion losses of balconies on a building façade and the underlying wave interactions

Cited by 12 publications

References 19 publications

Sound insulation performance and modal analysis of asymmetrical insulating laminated glass

Sound insulation performance and modal analysis of asymmetrical insulating laminated glass

Yapı cephe özellikleri ve yol genişliğinin çevresel gürültü düzeyine etkisinin kentsel yol kesitleri üzerinden incelenmesi

The use of façade sun shading systems for the reduction of indoor and outdoor sound pressure levels

Contact Info

Product

Resources

About