An unusual instance of acoustic retroreflection in architecture – Ports 1961 Shanghai flagship store façade

Cabrera, Densil; Holmes, Jonothan; Caldwell, Hugo; Yadav, Manuj; Gao, Kai

doi:10.1016/j.apacoust.2018.04.004

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…To take the actual noise environment into account, some studies directly measure the acoustic performance of a façade on-site to make the results more reliable. 53–62 For example, field measurements have been carried out to investigate the façade sound insulation ability of balcony windows. 53 The measurements were taken with the guidance in ISO 140-5 and the Single Number Quantities (SNQ) was analyzed accordingly.…”

Section: Studies On Sound Insulation Of Building Façadementioning

confidence: 99%

A critical review of acoustic modeling and research on building façade

Zayed

2021

Building Acoustics

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Noise pollution has been impacting negatively on living comfort and working environment for a long time. Acoustic treatment on building façade is one of the effective means to tackle this issue. Numerous articles were published over the past decades to address the acoustic related problems of building façade. However, a systematic review of the research development on façade acoustic technology is lacking. Therefore, this paper examines the published research articles from seven selected journals, in terms of the annual number of articles, citation counts, co-authorships, research locations, and keywords. The analyses show that interest in façade acoustics increased during the last two decades. Researchers from Europe and areas with a high density of tall buildings made significant contributions to this development. Based on keyword analysis, articles are categorized into three groups. These include sound insulation studies, studies on the effect of façade on street noise, and noise reduction techniques. The surveyed research topics comprise numerical modeling, experimental studies, ISO standard development, and analyses on annoyance level. Potential future directions are presented based on a summary of the limitations of the existing research. This paper offers researchers and engineers an in-depth understanding of the state-of-the-art of the current façade acoustic research. Additionally, potential future directions are identified based on the findings and limitations of the previous studies.

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Section: Studies On Sound Insulation Of Building Façadementioning

confidence: 99%

A critical review of acoustic modeling and research on building façade

Zayed

2021

Building Acoustics

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“…The present paper investigated another step-related acoustic phenomenon in distinctive and sometimes monumental and ancient architecture: acoustic retroreflection in some Indian stepwells. This phenomenon arises in cases where there are many simultaneously visible concave trihedral right-angle corners and has been previously studied in building façades [6][7][8]. It is characterised by a multitude of reflections returning to the source…”

Section: Introductionmentioning

confidence: 99%

“…While pre-existing cases of acoustic retroreflection in architecture have been identified in building façades [6][7][8], finding pre-existing extensive cases in room acoustics is more challenging. Indoors, candidates for incidental retroreflection could include rooms with simple coffered ceilings (where surfaces are planar and perpendicular) [16].…”

Section: Introduction To Acoustic Retroreflection In Architecturementioning

confidence: 99%

“…In northern and western parts of India, where the structures studied in this paper are located, they can be referred to using several terms, which may depend on their history, purpose, colloquial usage, use in the literature, etc. Some common terms include baori/baoli ( While pre-existing cases of acoustic retroreflection in architecture have been identified in building façades [6][7][8], finding pre-existing extensive cases in room acoustics is more challenging. Indoors, candidates for incidental retroreflection could include rooms with simple coffered ceilings (where surfaces are planar and perpendicular) [16].…”

Section: Introduction To Indian Stepped Pondsmentioning

confidence: 99%

“…Table 1 indicates that there is typically about one step per square metre of top area (ranging from 0.87 at Jaipura Kund to 1.42 at Idar Stepped Pond). This ratio is mostly governed by the horizontal area of individual steps and platforms and the area of the pool in Sanskrit and Hindi), barav ( While pre-existing cases of acoustic retroreflection in architecture have been identified in building façades [6][7][8], finding pre-existing extensive cases in room acoustics is more challenging. Indoors, candidates for incidental retroreflection could include rooms with simple coffered ceilings (where surfaces are planar and perpendicular) [16].…”

Section: Introduction To Indian Stepped Pondsmentioning

confidence: 99%

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Sound Reflections in Indian Stepwells: Modelling Acoustically Retroreflective Architecture

Cabrera

Holmes

et al. 2022

Acoustics

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Retroreflection is rarely used as a surface treatment in architectural acoustics but is found incidentally with building surfaces that have many simultaneously visible concave right-angle trihedral corners. Such surfaces concentrate reflected sound onto the sound source, mostly at high frequencies. This study investigated the potential for some Indian stepwells (stepped ponds, known as a kund or baori/baoli in Hindi) to provide exceptionally acoustically retroreflective semi-enclosed environments because of the unusually large number of corners formed by the steps. Two cases—Panna Meena ka Kund and Lahan Vav—were investigated using finite-difference time-domain (FDTD) acoustic simulation. The results are consistent with retroreflection, showing reflected energy concentrating on the source position mostly in the high-frequency bands (4 kHz and 2 kHz octave bands). However, the larger stepped pond has substantially less retroreflection, even though it has many more corners, because of the greater diffraction loss over the longer distances. Retroreflection is still evident (but reduced) with non-right-angle trihedral corners (80–100°). The overall results are sufficiently strong to indicate that acoustic retroreflection should be audible to an attuned visitor in benign environmental conditions, at least at moderately sized stepped ponds that are in good geometric condition.

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Railway noise in urban areas: assessment and prediction on infrastructure improvement combined with settlement development and regeneration in central Italy

Fiorini

2022

Applied Acoustics

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An unusual instance of acoustic retroreflection in architecture – Ports 1961 Shanghai flagship store façade

Cited by 10 publications

References 26 publications

A critical review of acoustic modeling and research on building façade

A critical review of acoustic modeling and research on building façade

Sound Reflections in Indian Stepwells: Modelling Acoustically Retroreflective Architecture

Railway noise in urban areas: assessment and prediction on infrastructure improvement combined with settlement development and regeneration in central Italy

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