BUILDING ACOUSTICS最新文献_第6页

An ultra-thin multi-layered metamaterial for power transformer noise absorption 一种电力变压器吸声用超薄多层超材料

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-08-28 DOI: 10.1177/1351010X211041704

N. Sharafkhani

引用次数: 1

Acoustics in South African classrooms: Regulations versus reality 南非课堂声学：法规与现实

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-08-13 DOI: 10.1177/1351010X211036904

Coralie van Reenen, C. Plessis

{"title":"Acoustics in South African classrooms: Regulations versus reality","authors":"Coralie van Reenen, C. Plessis","doi":"10.1177/1351010X211036904","DOIUrl":"https://doi.org/10.1177/1351010X211036904","url":null,"abstract":"This research set out to broaden the pool of evidence regarding the acoustic conditions at schools in South Africa. A review of local and international literature, standards and design guidelines shows that the ideal classroom acoustic conditions of 35 dBA ambient and 0.7 s reverberation time are required to enable a suitable environment for teaching and learning. A review of local literature revealed a very small body of knowledge regarding actual acoustic conditions and monitoring of classroom acoustics and that these cases demonstrated ambient noise levels in classrooms (whether occupied or unoccupied) to be above the recommendations of the relevant South African National Standard (SANS 10103). The limited local research promted the need for this case study. The findings of a province-wide survey of urban schools showed that traffic noise is the main source of noise disturbance in schools. A case study of five schools showed that the average outdoor noise level at schools exposed to traffic throughout the day is 63.3 dBA and the average indoor noise level at these schools when classrooms are unoccupied is approximately 58 dBA, which is significantly higher than the requirement. The reverberation time in classrooms was between 0.6 and 1.75 s. It is concluded that the current acoustic conditions in South African urban schools is poor when evaluated against the South African National Standards. However, since this is based on only five case studies, a broader study is required to understand the general conditions and establish suitable mitigation measures.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"29 1","pages":"157 - 178"},"PeriodicalIF":1.7,"publicationDate":"2021-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43286281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Sound predictions in an urban context 城市背景下的声音预测

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-07-28 DOI: 10.1177/1351010X211034665

J. Niesten, MJ Tenpierik, J. Krimm

引用次数: 3

A critical review of acoustic modeling and research on building façade 建筑立面声学建模与研究综述

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-07-19 DOI: 10.1177/1351010X211022736

Zhongyu Hu, T. Zayed, Li Cheng

{"title":"A critical review of acoustic modeling and research on building façade","authors":"Zhongyu Hu, T. Zayed, Li Cheng","doi":"10.1177/1351010X211022736","DOIUrl":"https://doi.org/10.1177/1351010X211022736","url":null,"abstract":"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.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"29 1","pages":"107 - 134"},"PeriodicalIF":1.7,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X211022736","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43946969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Noise reduction performance of a low energy façade-integrated mechanical ventilator 一种低能耗空气空气一体化机械通风机的降噪性能

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-06-01 DOI: 10.1177/1351010X20966185

M. A. Oliveira, L. Bragança, S. Silva, Dinara Paixão, J. António

{"title":"Noise reduction performance of a low energy façade-integrated mechanical ventilator","authors":"M. A. Oliveira, L. Bragança, S. Silva, Dinara Paixão, J. António","doi":"10.1177/1351010X20966185","DOIUrl":"https://doi.org/10.1177/1351010X20966185","url":null,"abstract":"Acoustic comfort and indoor air quality are essential for the health and wellbeing of the occupants of the building. Thus, the façade must guarantee enough sound insulation and ventilation conditions. However, these aspects conflict because opening windows or using ventilation openings reduces the sound insulation of the envelope and allows the exterior noise entrance. To limit noise transmission into the building, ventilators use passive, active or hybrid noise control techniques. This work addresses the noise reduction performance of a mechanical ventilator for façades, evaluating the effect of different options of passive noise control strategies in the sound insulation of the proposed ventilator. In addition, the air change rate and energy consumption of the ventilator were also investigated. Three prototypes were fabricated and tested at an acoustic chamber, along with ventilation tests carried out in a room equipped with a blower door. CFD simulations were used to enhance the aeraulic geometry of the prototypes, prior to its fabrication. The acoustic experiments showed Dn,e,w values up to 55 dB and noise emission levels lower than 25 dB(A). The use of resistive sound absorbers proved to be more effective in mitigating noise than reactive absorbers, over the entire frequency range. The ventilation tests revealed air change rates of 3.7 h−1 at 50 Pa, while the ventilator’s annual energy consumption was 17.52 kWh. The results highlight the proposed device as a viable alternative for decentralised mechanical ventilation, capable of ensuring noise protection and satisfactory ventilation rates, under a sustainable perspective of minimum energy demand.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"119 - 139"},"PeriodicalIF":1.7,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20966185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48259076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary rolling noise measurements toward the design of a standard rolling noise device 初步的轧制噪声测量，以设计一个标准的轧制噪声装置

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-05-31 DOI: 10.1177/1351010X211019216

M. Edwards, Raimundo Gonzalez Diaz, Nadia Dallaji, L. Jaouen, F. Chevillotte, N. Totaro

{"title":"Preliminary rolling noise measurements toward the design of a standard rolling noise device","authors":"M. Edwards, Raimundo Gonzalez Diaz, Nadia Dallaji, L. Jaouen, F. Chevillotte, N. Totaro","doi":"10.1177/1351010X211019216","DOIUrl":"https://doi.org/10.1177/1351010X211019216","url":null,"abstract":"The tapping machine has long existed as the primary standard method for measuring the performance of floors in buildings in response to structure-borne noise. However, other sources of structure-borne noise exist. One of these is rolling noise: such as a trolley rolling across the floor in an indoor building environment. Because the sound profile of indoor rolling noise is substantially different than that of impact noise, the techniques developed to reduce the latter may not necessarily be effective at reducing the former. To this end, a means of repeatably measuring indoor rolling noise is needed. Here the results of a study on indoor rolling noise are presented, identifying the various characteristics of this type of excitation which until now have been left unexplored. The proposal for a standard rolling device is also put forth: a machine which may be capable of characterizing a floor’s performance with regards to indoor rolling noise. A series of indoor rolling noise tests were conducted in order to characterize the range of sound profiles that various indoor rolling items are capable of producing, as well as identify how the different characteristics govern the shape of the sound profile produced. Just as the standard tapping machine assesses a floor’s performance in response to impact noise, a standard rolling machine may assess a floor’s performance in response to rolling noise.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"29 1","pages":"3 - 25"},"PeriodicalIF":1.7,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X211019216","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44320143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the insertion loss of multilayer panels featuring a periodic structure 周期结构多层板插入损耗的实验研究

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-03-18 DOI: 10.1177/1351010X211001551

P. Gulia, Arpan Gupta

{"title":"Experimental study on the insertion loss of multilayer panels featuring a periodic structure","authors":"P. Gulia, Arpan Gupta","doi":"10.1177/1351010X211001551","DOIUrl":"https://doi.org/10.1177/1351010X211001551","url":null,"abstract":"Acoustic panels with different configurations (layered structure with different absorbing materials) are broadly used to attenuate the noise. Multiple panels are preferred due to the presence of multiple air cavities and the repeated reflections which lead to increased sound attenuation. The paper presents an experimental study of sound propagation through multiple panels. A novel design of acoustic panel is proposed by incorporating the sonic crystal in the air cavities of the panel. Sonic crystal (SC) consists of a periodic arrangement of sound hard scatterers which provide the sound reduction in a particular frequency range due to destructive interference in periodic scatterers. The results are based on experimental observations which are supported by the literature. The results show that increasing the number of panels increases the sound insertion loss from the multiple panel structure. However, the panels with air cavity suffer from the sound insertion loss dip, which makes the panel ineffective. The novel acoustic panel (double and triple panel with SC) provides an additional sound reduction due to SC which can be tailored for certain frequency band. For the present case, SC is designed to overcome the insertion loss dip. The novel panel provides an additional insertion loss, reaching a maximum value of 19 and 11 dB, respectively (for the double and triple panel), overcoming the insertion loss dip due to structural vibration.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"461 - 475"},"PeriodicalIF":1.7,"publicationDate":"2021-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X211001551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42814831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Airborne sound insulation prediction of masonry walls using artificial neural networks 基于人工神经网络的砌体墙体机载隔声预测

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-02-25 DOI: 10.1177/1351010X21994462

Serpilli Fabio, D. Giovanni, Pierantozzi Mariano

{"title":"Airborne sound insulation prediction of masonry walls using artificial neural networks","authors":"Serpilli Fabio, D. Giovanni, Pierantozzi Mariano","doi":"10.1177/1351010X21994462","DOIUrl":"https://doi.org/10.1177/1351010X21994462","url":null,"abstract":"In this paper, an alternative method for the calculation of masonry walls sound insulation is investigated. Thirty-four simple monolithic brick walls were examined. For the considered walls, the measurements made by accredited laboratories in compliance with ISO 10140 standard were collected. For each building element, the experimental measurements and all the information concerning the geometric and physical characteristics of all the components (material, dimensions, mass, density, Young’s modulus, Poisson’s module, hole content, etc.) were classified. Then, from the collection of measurements obtained in the standard laboratories and the division of them into homogeneous groups, a statistical sensitivity analysis to determine the most statistically significant parameter for the sound insulation of building walls was carried out. This analysis was a useful tool for selecting parameters to be used in forecast models and for calculating statistical effects. Finally, an alternative method based on the use of artificial neural networks (ANN) was proposed. This paper discusses the results obtained by applying the models to a specific kind of construction: the masonry walls. The results will show a good correlation of the values obtained on this first type of building construction. This encourages the extension of the method explained in this work to other types of walls.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"391 - 409"},"PeriodicalIF":1.7,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X21994462","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42156788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

On best acoustical parameters’ values for ‘Liederistic’ music performance: A preliminary study 关于“Liederistic”音乐表演的最佳声学参数值:初步研究

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-02-17 DOI: 10.1177/1351010X21994973

P. Domenighini

{"title":"On best acoustical parameters’ values for ‘Liederistic’ music performance: A preliminary study","authors":"P. Domenighini","doi":"10.1177/1351010X21994973","DOIUrl":"https://doi.org/10.1177/1351010X21994973","url":null,"abstract":"‘Liederistic’ music is a musical genre on which architectural acoustical research is rarely focused. Despite this lack of scholarship, however, this genre represents one of the most interesting challenges for acoustical problem solving. In fact, it combines speech and music comprehension requirements in a fascinating manner to illuminate elements of both the magnification of the musical score and the hidden tension of a sung poetry text. To individualise the main characteristics of this genre, a multidisciplinary approach is taken, starting from a musical point of view. A knowledge and comprehension of music is a fundamental step to determine the parameters that allow for the best performance and listening experience of this particular music. Consequently, an introduction to the physics and acoustical characteristics of the singing voice and the piano is given, specifically highlighting the technological development of the piano since the 18th century. Through a combination of historical, architectural, and interior design research, a possible location of the original performance is recreated to investigate the probable primal acoustic conditions using computational analysis. Various contemporary chamber music halls were then considered and compared to the reconstructed location to investigate whether actual places exist with similar acoustic conditions.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"361 - 390"},"PeriodicalIF":1.7,"publicationDate":"2021-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X21994973","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42932282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A data acquisition setup for data driven acoustic design 数据驱动声学设计的数据采集装置

IF 1.7

BUILDING ACOUSTICS Pub Date : 2021-02-14 DOI: 10.1177/1351010X20986901

R. Rust, Achilleas Xydis, K. Heutschi, Nathanael Perraudin, Gonzalo Casas, Chao Du, J. Strauss, K. Eggenschwiler, F. Pérez-Cruz, F. Gramazio, M. Kohler

{"title":"A data acquisition setup for data driven acoustic design","authors":"R. Rust, Achilleas Xydis, K. Heutschi, Nathanael Perraudin, Gonzalo Casas, Chao Du, J. Strauss, K. Eggenschwiler, F. Pérez-Cruz, F. Gramazio, M. Kohler","doi":"10.1177/1351010X20986901","DOIUrl":"https://doi.org/10.1177/1351010X20986901","url":null,"abstract":"In this paper, we present a novel interdisciplinary approach to study the relationship between diffusive surface structures and their acoustic performance. Using computational design, surface structures are iteratively generated and 3D printed at 1:10 model scale. They originate from different fabrication typologies and are designed to have acoustic diffusion and absorption effects. An automated robotic process measures the impulse responses of these surfaces by positioning a microphone and a speaker at multiple locations. The collected data serves two purposes: first, as an exploratory catalogue of different spatio-temporal-acoustic scenarios and second, as data set for predicting the acoustic response of digitally designed surface geometries using machine learning. In this paper, we present the automated data acquisition setup, the data processing and the computational generation of diffusive surface structures. We describe first results of comparative studies of measured surface panels and conclude with steps of future research.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"345 - 360"},"PeriodicalIF":1.7,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20986901","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46740876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2