BUILDING ACOUSTICS最新文献_第2页

Assessment of indoor exposure to outdoor environmental noise and effects on occupant comfort in multi-unit residential buildings 多单元住宅室内暴露于室外环境噪声及其对居住者舒适性影响的评估

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-08-22 DOI: 10.1177/1351010X231194471

Maedot S. Andargie, M. Touchie, W. O’brien, M. Müller-Trapet

{"title":"Assessment of indoor exposure to outdoor environmental noise and effects on occupant comfort in multi-unit residential buildings","authors":"Maedot S. Andargie, M. Touchie, W. O’brien, M. Müller-Trapet","doi":"10.1177/1351010X231194471","DOIUrl":"https://doi.org/10.1177/1351010X231194471","url":null,"abstract":"Outdoor environmental noise is a major source of annoyance in urban areas and exposure to it can increase the risk of severe health issues. Consequently, it has been the focus of research for decades. Even though people spend the majority of their time indoors, most studies use outdoor noise levels and do not include indoor noise measurements to estimate real exposure levels. This study conducted simultaneous indoor and outdoor noise measurements for 24 h in four multi-unit residential buildings to identify the levels and sources of outdoor noise heard indoors and quantify the effects of outdoor noise on indoor levels. The measurements were conducted in unoccupied suites that are most exposed to traffic and other outdoor noise sources. Surveys were administered following building occupancy to collect information regarding perceived acoustic comfort levels due to outdoor noise. The indoor LAeq,24h in three of the study buildings were above 40 dB(A) and exceeded WHO’s noise level limits. Regression analysis showed that outdoor noise only explains 14%–58% of the variability in indoor noise levels. This is mainly because of heating, ventilation, and air conditioning (HVAC) system noise which resulted in consistently high indoor noise levels despite variations in outdoor noise. Analysis of the survey showed a poor correlation between reported annoyance and measured noise levels. But annoyance strongly depended on other factors such as suite location and noise sensitivity. The findings show that outdoor noise measurements alone may not be good predictors of exposure levels and the effects of outdoor noise on occupants.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"30 1","pages":"293 - 313"},"PeriodicalIF":1.7,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42408270","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

Numerical and experimental methods to measure the acoustic performance of sonic crystal noise barrier 声学晶体隔音屏障声学性能的数值和实验测量方法

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-07-20 DOI: 10.1177/1351010X231179003

K. Mohapatra, DP Jena

引用次数: 0

Experimental evidences of nonlinear programmable electroacoustic loudspeaker 非线性可编程电声扬声器的实验证据

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-07-07 DOI: 10.1177/1351010X231184040

C. da Silveira Zanin, Aurélie Labetoulle, E. De Bono, E. Gourdon, M. Collet, A. Ture Savadkoohi

引用次数: 0

Applying vertical greening systems to reduce traffic noise in outdoor environments: Overview of key design parameters and research methods 应用垂直绿化系统减少室外环境中的交通噪声:关键设计参数和研究方法概述

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-05-17 DOI: 10.1177/1351010X231171028

Jesse Bakker, M. Lugten, M. Tenpierik

引用次数: 0

Vibroacoustic analysis of multi-layered micro-perforated plates coupled to an acoustic enclosure 多层微穿孔板耦合声罩的振动声分析

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-05-01 DOI: 10.1177/1351010X231169827

Brahim El kharras, M. Garoum, A. Bybi

{"title":"Vibroacoustic analysis of multi-layered micro-perforated plates coupled to an acoustic enclosure","authors":"Brahim El kharras, M. Garoum, A. Bybi","doi":"10.1177/1351010X231169827","DOIUrl":"https://doi.org/10.1177/1351010X231169827","url":null,"abstract":"A vibroacoustic study of multi-layered micro-perforated plates (MPP) coupled to an enclosure cavity excited by internal and external acoustic excitations is presented. Most previous research centered on the multi-layered MPPs structure itself, the absorption and transmission performances were often calculated or tested in a simple acoustic environment. In a more realistic setting, the surrounding systems may affect the efficiency of MPPs. The proper modeling of the MPPs within acoustic enclosures requires careful study. The break-out sound from an enclosure via multi-layered MPP and the energy transmission of the structure into an acoustic enclosure undergoing exterior excitation are studied with an emphasis on the use of MPP in acoustic enclosures to suppress specific resonances of the enclosure. Therefore, an analytical formulation is proposed to model the behavior of the coupled system to address this issue. Using a modified Fourier series for the acoustic pressure, the continuity of the normal velocities at the interfaces of the plate or the MPP and the acoustic medium is assured accurately. A modified variational form for the acoustic and structure medium yields a completely coupled vibroacoustic system. Comparison with the finite element method (FEM) and available literature findings prove the efficacy and precision of the current approach. The effect of important parameters on the vibroacoustic behavior of multi-layered MPPs structure connected to an acoustic enclosure is examined. These parameters include micro-perforation of the plate, hole diameter, air gap thickness, acoustic enclosure dimensions, and the insertion of absorbent material in the gap.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"30 1","pages":"265 - 292"},"PeriodicalIF":1.7,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46234942","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

Application of the wave and finite element method to predict the acoustic performance of double-leaf cross-laminated timber panels 波浪法和有限元法在双叶交叉层合板声学性能预测中的应用

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-04-03 DOI: 10.1177/1351010X231162483

Chiaki Fenemore, M. Kingan, B. Mace

引用次数: 2

The strong influence of small construction errors on sound insulation of buildings with heavyweight concrete structure: A Portuguese case study 小型施工误差对重型混凝土结构建筑隔声的强烈影响——以葡萄牙为例

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-04-02 DOI: 10.1177/1351010X231162811

D. Mateus, A. Pereira

{"title":"The strong influence of small construction errors on sound insulation of buildings with heavyweight concrete structure: A Portuguese case study","authors":"D. Mateus, A. Pereira","doi":"10.1177/1351010X231162811","DOIUrl":"https://doi.org/10.1177/1351010X231162811","url":null,"abstract":"In order to attain an expected sound insulation in buildings, it is necessary to employ appropriated constructive solutions, but it is also fundamental to guarantee compatibility with other involved design professional fields, proper detailing of solutions and correct on site mounting. A solution with a predicted high acoustic performance may result in failure if there is no proper interconnection between other design professional areas or if execution mistakes occur, even if of very small dimension. The main objective of this technical paper is to analyse the influence of defects that typically occur in buildings, located in Portugal, resulting in very poor airborne or impact sound insulation performance. The chosen situations refer to buildings with heavyweight concrete structure, where small construction defects occurred and/or wrong decisions were taken, ending up with a large reduction on the final acoustic performance. Some of these errors, given their small size or because they occurred in hidden zones, easily passed unnoticed, on site. The defects here addressed in what refers to airborne sound insulation are related with execution of double masonry hollow brick walls, sound bridges in acoustic suspended ceilings, passage of ventilation or sewage pipes, inappropriate installation of acoustic doors, shutter boxes or windows. As for impact sound insulation, the presence of rigid connections is the main focus of the characterisation here performed.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"30 1","pages":"227 - 246"},"PeriodicalIF":1.7,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45889596","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

Assessment of speech intelligibility in scholar classrooms by measurements and prediction methods 通过测量和预测方法评估学者课堂的语音可理解性

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-03-16 DOI: 10.1177/1351010X231158190

Samantha Di Loreto, Michela Cantarini, S. Squartini, Valter Lori, Fabio Serpilli, C. di Perna

{"title":"Assessment of speech intelligibility in scholar classrooms by measurements and prediction methods","authors":"Samantha Di Loreto, Michela Cantarini, S. Squartini, Valter Lori, Fabio Serpilli, C. di Perna","doi":"10.1177/1351010X231158190","DOIUrl":"https://doi.org/10.1177/1351010X231158190","url":null,"abstract":"According to Italian regulation, the Ministerial Decree of 11 October 2017 about Environmental Criteria, reference values for acoustic indoor quality descriptors in public buildings are imposed. Regarding school environments, indoor acoustic quality targets refer to reverberation time, clarity, and speech intelligibility, whose representative acoustic descriptor is the speech transmission index (STI). This paper presents pyeSTImate, a Python-based tool for speech transmission index prediction in lecture rooms. The tool returns fully simulated results from the dimensions and material characteristics of classrooms with parallelepiped geometry and without limitations in size. Extensive experiments have been conducted with different simulation methods, evaluating the accuracy by comparison with in situ measurements selected from primary, secondary, and university classrooms in school buildings of the Marche Region in Italy. The combination of simulated speech transmission indexes with a prediction method based on an artificial neural network has also been evaluated. The analysis of the performance demonstrates the computational robustness of the tool that enables its use for the analysis of existing rooms, as well as for the renovation and design of new spaces.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"30 1","pages":"165 - 202"},"PeriodicalIF":1.7,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48232813","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

Evaluation of the dynamic response for scaled models of shaped concrete floor slabs 异形混凝土楼板按比例模型的动力响应评估

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-03-14 DOI: 10.1177/1351010X231157613

Jonathan M Broyles, Micah R. Shepherd, Nathan C. Brown

引用次数: 0

The influence of a thin, natural cellulose fibre membrane on the acoustic absorption of a layer of melamine foam 薄的天然纤维素纤维膜对一层三聚氰胺泡沫吸声的影响

IF 1.7

BUILDING ACOUSTICS Pub Date : 2023-02-21 DOI: 10.1177/1351010X231154171

Wenhao Xu, K. Horoshenkov, Yun Jin

{"title":"The influence of a thin, natural cellulose fibre membrane on the acoustic absorption of a layer of melamine foam","authors":"Wenhao Xu, K. Horoshenkov, Yun Jin","doi":"10.1177/1351010X231154171","DOIUrl":"https://doi.org/10.1177/1351010X231154171","url":null,"abstract":"Porous materials such a melamine foam are commonly used to absorb noise and to control reverberation time in buildings. However, the ability of a thin porous layer to absorb noise at acoustic wavelengths that is much greater than the layer thickness is limited. This work investigates theoretically and experimentally the influence of a very thin, natural cellulose membrane on the sound absorption coefficient of a melamine foam substrate. The experimental results demonstrate that the presence of a 120 μm cellulose membrane can more than double the sound absorption coefficient of a relatively thin (17.4 mm) layer of melamine foam at frequencies above 600 Hz (577 mm wavelength). The theoretical part of work explains this effect through a careful simulation. The results show that there are analytical models that can accurately predict the acoustical behaviour of the cellulose membrane combined with a layer of melamine foam. The effects of the flow resistivity and thickness of a cellulose fibre membrane on the acoustic absorption coefficient of the melamine foam substrate are also studied through modelling and experiment. It is found that the optimum thickness of the cellulose fibre membrane should be between 75 and 100 µm when laminated on the top of a 20 mm melamine foam substrate. This work suggests that thin layers of sustainable natural materials such as cellulose fibres can be used to significantly improve the ability of traditional porous media to absorb sound.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"30 1","pages":"127 - 142"},"PeriodicalIF":1.7,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43858797","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