Full scale field study of sound transmission across plenum windows

Tong, Yean Ghing; Tang, Shiu Keung; Kang, Jian; Fung, Andrew K.; Yeung, Maurice

doi:10.1016/j.apacoust.2014.10.003

Cited by 50 publications

(29 citation statements)

References 18 publications

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“…Apart from the effect of sound absorption lining on the glass panes, discussed in Kang and The insertion losses of the horizontal type plenum windows were further tested using a site mockup, whose façade was next to and parallel to a busy trunk road [64]. In this mockup, two side-by-side standard residential units of a Hong Kong public housing estate, were constructed.…”

Section: Plenum Windows/double-wall Structures With Staggered Air Inlmentioning

confidence: 99%

“…The effect of the window orientation, relative to the sound source, θ, was also tested. Their results show that, for a fixed overall window width L, the insertion loss of a plenum window generally increased with increasing overlapping length G, but decreased with increasing window opening sizes (W 1 and W 2 ), or gap width D. In their study, the overall window width, L, equals G + W 1 + W 2 and W 1 = W 2 = W. The maximum and minimum traffic noise insertion loss increases, achieved by replacing an opened casement window with a plenum window of the same overall window size, where The insertion losses of the horizontal type plenum windows were further tested using a site mockup, whose façade was next to and parallel to a busy trunk road [64]. In this mockup, two sideby-side standard residential units of a Hong Kong public housing estate, were constructed.…”

Section: Plenum Windows/double-wall Structures With Staggered Air Inlmentioning

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: Plenum Windows/double-wall Structures With Staggered Air Inlmentioning

confidence: 99%

Section: Plenum Windows/double-wall Structures With Staggered Air Inlmentioning

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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“…However, the correlation coefficient was higher for the window to external wall area ratio (0.45) than that for the window to floor area ratio (0.36). WhileShield and Dockrell (2004) [29]could not arrive at a conclusive confirmation for such relationship, several other studies like Aasvang et al (2008) [30] carried out in bedrooms exposed to railway noise, and Tong et al (2015) [31] carried out in unoccupied test rooms, established similar relationship between indoor sound levels with building characteristics related to the widow area and type. This suggests that direct relationship between indoor sound pressure levels and building characteristics related to window sizes exists in different outdoor/indoor acoustic context within which a building is located.…”

Section: Discussionmentioning

confidence: 95%

An Assessment of Indoor Acoustic Condition in Students Hostels within Obafemi Awolowo University, Nigeria

Orola¹,

David²

2019

OJA

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It has been hypothesized that objective assessment for building acoustic conditions only may not always be representative of the users' perception in occupied indoor spaces. This study objectively and subjectively examined indoor acoustic condition in rooms within students' hostels in Obafemi Awolowo University, Nigeria. The objective assessment considered the physical measurement of sound pressure level in the rooms in relation to the rooms' physical characteristics like window to external wall area and window to floor area ratios. The subjective assessment considered the occupants' perception of the acoustic condition in the rooms in relation to their personal characteristics like age, gender, body mass index, metabolic rate, and body skin area. The sound pressure level was measured in each of the randomly selected 44 rooms at 15 minute intervals between 7 hours and 19 hours daily through a period of eight weeks. The measurement was done with High Accuracy Digital Sound Noise Level Data Loggers placed at work plane at the centre of the rooms. The geometry of the rooms was documented through physical measurements. All the occupants of the selected rooms as well as the two adjoining rooms, amounting to 696 respondents, were purposively selected to fill a questionnaire regarding activities carried out in the rooms, the frequency of fenestration opening, the personal characteristics of the occupants and the rooms' occupancy ratio. This study established a strong correlation between the objective and subjective assessments of the acoustic condition in the spaces. Moreover, out of all the occupants' personal characteristics considered, it was the age that has a relationship with the occupants' perception of the acoustic condition that is closest to significant level.The relationship between their perception and measured sound pressure level was slightly more pronounced among the male gender than the female with correlation coefficients of 0.115 and 0.096 respectively. This study concluded that none of

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“…[4] that, with respect to traffic noise, the sound reduction index of ventilation windows is about 9 dBA higher than that of open single-layered sliding window. Based on such design, Tong et al [5] compared the sound insertion loss with ventilation and conventional side-hung casement windows installed in two mock-up apartments near a busy traffic road. It has shown that the acoustical benefit from ventilation windows is 7.1-9.5 dBA.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Sound Insulation of Ventilation Partitions

Du¹,

Lau²,

Lee³

2019

J Acoust

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Plenum windows that ensure noise reduction and natural ventilation at the same time have been studied by many researchers. Without sacrificing the window transparency and ventilation, limited acoustical treatments could be implemented in the cavity between two glass panes to enhance noise reduction performance of plenum windows, and accordingly the sound insulation performance by plenum windows hits a bottleneck. Ventilation partition with a similar configuration to plenum windows and consisting of two opaque partition panels with staggered openings is proposed. The paper experimentally studies the sound transmission loss of six ventilation partitions with different acoustical treatments. The measurement results show that their sound transmission class (STC) ratings can be up to 21 STC points higher than that without any acoustical treatment, and the sound transmission losses are even higher than that of a closed single-layered partition at middle and high frequencies with respect to specific designs. The STC of the six ventilation partitions with acoustical treatments investigated in the present study is between STC 22 and STC 32, more than 11 STC points higher than that without any treatment.

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Full scale field study of sound transmission across plenum windows

Cited by 50 publications

References 18 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

An Assessment of Indoor Acoustic Condition in Students Hostels within Obafemi Awolowo University, Nigeria

Experimental Study on Sound Insulation of Ventilation Partitions

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