BUILDING ACOUSTICS最新文献_第8页

Sound insulation of timber hollow box floors: Collection of laboratory measurement data and trend analysis 木质空心箱地板的隔音：实验室测量数据的收集和趋势分析

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-10-24 DOI: 10.1177/1351010X20966157

A. Homb, Simone Conta, Christopher J. Geyer, Niko Kumer

{"title":"Sound insulation of timber hollow box floors: Collection of laboratory measurement data and trend analysis","authors":"A. Homb, Simone Conta, Christopher J. Geyer, Niko Kumer","doi":"10.1177/1351010X20966157","DOIUrl":"https://doi.org/10.1177/1351010X20966157","url":null,"abstract":"The industrialisation of timber buildings has improved strongly in recent years. When long span is required, timber hollow-box floor elements are increasingly used due to their structural performance. The aim of this paper is to assess the acoustic performance of timber hollow-box floors, determine the governing parameters and identify the corresponding trends. We collected results from laboratory measurements covering both airborne and impact sound insulation from four different laboratories covering a wide range of application. Data include the bare floor constructions and their combination with different floating floors including both lightweight solutions and hybrid solution. We performed the analysis focusing on following parameters: element stiffness, element mass per unit area, dynamic stiffness of the resilient layer, cavity filling and floating floor material. We present the collected data both frequency-dependent and as single number quantities. General trends and features are identified in the frequency-dependent diagrams. A further detailed analysis is based on the single number quantities. It includes a general relationship between element mass per unit area and given requirements for R’W + C50-5000 and L’n,w + CI,50-2500. Furthermore, diagrams are presented illustrating the dependence of impact sound insulation numbers on the cavity filling, the dynamic stiffness of the resilient layer and the type of material used for the floating floor. The additional mass in the cavity improves both airborne and impact sound insulation by minimum 10 dB. This, combined with a floating floor, allows the fulfilment of a wide range of requirements.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"161 - 183"},"PeriodicalIF":1.7,"publicationDate":"2020-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20966157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45870800","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

A ray tracing engine integrated with Blender and with uncertainty estimation: Description and initial results 与Blender和不确定性估计集成的光线追踪引擎:描述和初步结果

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-10-20 DOI: 10.1177/1351010X20964758

E. Brandão, G. Morgado, W. D. Fonseca

引用次数: 0

Acoustics of the Blue Whale Auditorium in Buenos Aires 布宜诺斯艾利斯蓝鲸礼堂的声学

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-09-28 DOI: 10.1177/1351010X20959261

G. Basso

引用次数: 0

The acoustic characteristics of the “Dives in Misericordia” Church in Rome 罗马“米塞里科迪亚教堂”的声学特征

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-08-08 DOI: 10.1177/1351010X20948653

Giuseppe Ciaburro, G. Iannace, A. Trematerra, Ilaria Lombardi, M. Abeti

{"title":"The acoustic characteristics of the “Dives in Misericordia” Church in Rome","authors":"Giuseppe Ciaburro, G. Iannace, A. Trematerra, Ilaria Lombardi, M. Abeti","doi":"10.1177/1351010X20948653","DOIUrl":"https://doi.org/10.1177/1351010X20948653","url":null,"abstract":"This paper discusses the acoustic characteristics of the “Dives in Misericordia” Church in Rome. The church was designed by architect Richard Meier and opened in 2003. It was made entirely of white concrete and consists of three septa with a double curve shaped like a sail. The nave roof is glass. The volume is approximately 14.000 cubic meters. The highest measuring is approximately 26 m. the width of the nave is 19.5 m, while the maximum width is 29.5 m, while the internal length is 32.0 m, while the total length is 45.6 m. It can seat approximately 240 people. The acoustic measurements were taken by placing a microphone at different points of the nave (the area occupied by the audience), with the sound source being placed on the altar. It was therefore possible to obtain a spatial distribution of the average acoustic characteristics inside the church. At a frequency of 1000 Hz, the average values of the reverberation time is about 10 s. In its current configuration, the church is neither suitable for understanding speech nor listening to music. A 3D virtual model was created and with the help of the building acoustics software it was possible to study the sound field inside the church. The possibility to carry out an appropriate acoustic correction was analyzed, in order to reduce the values of the reverberation time, by pacing on a side wall of the church an adequate number of sound-absorbing polyester panels.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"197 - 206"},"PeriodicalIF":1.7,"publicationDate":"2020-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20948653","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48263999","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: 8

Numerical study of acoustic transmission across heavily damped plate using hybrid Ray-Tracing-SEA method 基于混合光线跟踪SEA方法的强阻尼板声传输数值研究

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-07-15 DOI: 10.1177/1351010X20939553

Feng Yan, R. Wilson, P. Rutherford

{"title":"Numerical study of acoustic transmission across heavily damped plate using hybrid Ray-Tracing-SEA method","authors":"Feng Yan, R. Wilson, P. Rutherford","doi":"10.1177/1351010X20939553","DOIUrl":"https://doi.org/10.1177/1351010X20939553","url":null,"abstract":"Energy transmission across lightly damped structures has been well studied including the approved success of statistical energy analysis in mid and high frequency bands. For heavily damped elements, the diffuse field theory, which is used in computing coupling loss factors, tends to fail. Energy attenuation with distance becomes more significant for such elements and hence the energy is less likely to be evenly distributed within those elements. A ray tracing algorithm is developed taking account of this phenomenon by tracking the travel history of a great number of discrete rays. The predicted transmitted energy is used in a modified statistical energy analysis model to calculate energy level difference between different subsystems. Numerical validation and comparison on a concrete five-plate system are conducted in both lightly damped and heavily damped cases. Both the classic and the hybrid models show good agreement for lightly damped system and differ for heavily damped system. The difference tends to become larger with increasing frequency and internal damping level. The parameter “effective length ratio” is proposed to describe the phenomena of energy concentration along the edge and as in indicator of whether the application of diffuse field theory is appropriate.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"141 - 159"},"PeriodicalIF":1.7,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20939553","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46578714","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 research on acoustical comfort for hearing-impaired individuals in inclusive education places 全纳教育场所听障人士的声学舒适性研究

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-07-02 DOI: 10.1177/1351010X20923581

Zakariyya Uzeyirli, A. Özçevik Bilen

{"title":"A research on acoustical comfort for hearing-impaired individuals in inclusive education places","authors":"Zakariyya Uzeyirli, A. Özçevik Bilen","doi":"10.1177/1351010X20923581","DOIUrl":"https://doi.org/10.1177/1351010X20923581","url":null,"abstract":"The inclusive education method has substantial contributions to hearing-impaired individuals’ education and socialization. However, the poor physical environment and acoustic comfort conditions negatively affect speech intelligibility at such places and therefore, the quality of education. Upon determining that there are very few subjective evaluation studies, we conducted a study regarding the impact of acoustic comfort conditions on speech intelligibility at inclusive education places. Within the scope of the study, first, a classroom was determined, and the current acoustic conditions of the class were evaluated objectively by field acoustic measurements. A calibrated model was created in the simulation software of the relevant class and then two more models with optimum reverberation time values of 0.4 s and 0.8 s as suggested in the literature, and auralizations were performed for the models. For subjective evaluation, a subject group of hearing-impaired and normal hearing individuals fulfilling equal conditions were tested by speech discrimination test in real-time in the classroom and from auralization recordings in a laboratory setting. Regarding the results obtained, it was observed that speech intelligibility percentage of normal hearing individuals increased as expected while in hearing-impaired individuals, contrary to the expectations, percentage differed from one another, and there was no increase. Following the discussions with experts, it was concluded that different hearing aids used by hearing-impaired individuals might lead to this situation. Accordingly, it occurs that the possibility to achieve a good speech intelligibility for hearing-impaired individuals even if optimum acoustic values suggested are fulfilled in education places remains unclear.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"57 - 75"},"PeriodicalIF":1.7,"publicationDate":"2020-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20923581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45997794","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

Modelling sound absorption properties for recycled polyethylene terephthalate-based material using Gaussian regression 用高斯回归法模拟回收聚对苯二甲酸乙二醇酯基材料的吸声性能

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-06-15 DOI: 10.1177/1351010X20933132

G. Iannace, Giuseppe Ciaburro

引用次数: 15

Monitoring time-varying noise levels and perceived noisiness in hospital lobbies 监测医院大厅的时变噪声水平和感知噪声

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-06-12 DOI: 10.1177/1351010X20919868

Chiung-Yao Chen

{"title":"Monitoring time-varying noise levels and perceived noisiness in hospital lobbies","authors":"Chiung-Yao Chen","doi":"10.1177/1351010X20919868","DOIUrl":"https://doi.org/10.1177/1351010X20919868","url":null,"abstract":"The aim of this study was to verify what statistical attributes are effective descriptors of time-varying noise levels due to road traffic and complex medical routine activities in hospital lobbies. In a psychoacoustic experiment, respondents provided perceived noisiness ratings affected by 12 noise events in hospital lobbies according to the processes recommended by ISO 15666. According to the correlations between subjective and objective survey results, the average LAeq ,15 m induced during the daytime itself was confirmed to be poorly related to subjective noisiness. The three independent variables shown to have the largest effects on perceived noisiness were (1) L min − L max, (2) the effective duration of the normalized autocorrelation function (τe , h) of all LAeq ,15 m from 9:00 a.m. to 5:00 p.m., and (3) the gradient of the cumulative distribution function (0.3–0.7 cumulative rate range). These statistical attributes have been confirmed as useful tools for detecting perceptions of complicated noise sources, but the associated correlations cannot be recovered from the relevant previous studies. Finally, construction noise was confirmed by factor analysis to be the accidental noise source with the highest factor loading (0.779) but a lower variance (<11.5%) than that of the primary factor (38.6%), and it was an average of 8 dB louder than the background noise at any given time. Accordingly, it is a primary confounding variable of the correlation matrixes of the results for independent hospitals verified by normality test.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"28 1","pages":"35 - 55"},"PeriodicalIF":1.7,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20919868","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44700710","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: 3

The sound diffusion in Italian Opera Houses: Some examples 意大利歌剧院的声音扩散：几个例子

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-06-07 DOI: 10.1177/1351010X20929216

L. Tronchin, F. Merli, M. Manfren, Benedetto Nastasi

{"title":"The sound diffusion in Italian Opera Houses: Some examples","authors":"L. Tronchin, F. Merli, M. Manfren, Benedetto Nastasi","doi":"10.1177/1351010X20929216","DOIUrl":"https://doi.org/10.1177/1351010X20929216","url":null,"abstract":"Soundfield diffuseness in rooms is considered a fundamental aspect of a high-quality room acoustics. Since early studies by Hodgson up to more recent studies of Shtrepi and Embrechts, it was shown that high levels of sound diffuseness could guarantee blending of music, as well as spatial sound perception by listeners, and this could enhance the global indoor acoustic quality. Conversely, Italian-style Opera houses represent an important architectural place, in which the special features of the rich decorations, and the specific characteristics of the volume, give a unique atmosphere, including a peculiar psycho-acoustics impression. However, some geometric properties of the opera houses could influence the global acoustic perception. The shape of the marmorino wall on the stalls, as well as the parallelism of the lateral walls in the boxes, often causes a lack of spaciousness and sometimes in the worst cases provokes focalization. This phenomenon leads to design special devices that could be inserted in the theatres, to avoid focalization, even if they are rarely accepted. This article deals with the design of some acoustic diffusing panels and their functioning in three different theatres, combining both acoustics needs with architectural constraints. The article starts analysing and commenting on the issues that resulted from the measurements conducted in an Italian opera house. In the following step, three examples of the design of diffusing panels are proposed. Finally, the results of diffusion and scattering coefficient of panels realized in the last theatre considered here are reported.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"27 1","pages":"333 - 355"},"PeriodicalIF":1.7,"publicationDate":"2020-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20929216","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41741826","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

Validation and application of three-dimensional auralisation during concert hall renovation 立体听觉化在音乐厅装修中的验证与应用

IF 1.7

BUILDING ACOUSTICS Pub Date : 2020-06-05 DOI: 10.1177/1351010X20926791

L. Tronchin, F. Merli, M. Manfren, Benedetto Nastasi

{"title":"Validation and application of three-dimensional auralisation during concert hall renovation","authors":"L. Tronchin, F. Merli, M. Manfren, Benedetto Nastasi","doi":"10.1177/1351010X20926791","DOIUrl":"https://doi.org/10.1177/1351010X20926791","url":null,"abstract":"During the renovation of auditoria and concert halls, the acoustic quality is normally evaluated from measurements of impulse responses. One possibility for evaluating the acoustic quality from the measurements (the simulations) consists of convolving anechoic music with the measured (or simulated) impulse responses. In this way, a psycho-acoustic test is achieved using a virtual sound field representation. The listening room ‘Arlecchino’ at the University of Bologna includes ambisonics (up to fifth order) and stereo-dipole playback for virtual reproduction of sound in rooms. In this article, the effectiveness of the listening room ‘Arlecchino’ is first analysed, comparing acoustic parameters obtained from binaural impulse responses measured in some opera houses (in Italy) and auditorium (in Japan) with those virtually measured after the virtual reconstruction obtained in the listening rooms. The similarity between real and virtual sound fields, has been evaluated by comparing different acoustic parameters calculated by real and virtual sound fields, in four halls in different configurations, by means of the stereo-dipole method. In the second part of the article, the listening room was used to analyse the variation in interaural cross-correlation measurements in rooms obtained considering different anechoic sound signals convolved with the binaural impulse responses, to quantify the variation of the interaural cross correlation with different motifs. For this purpose, two different musical instrument digital interface musical motifs, very different from each other for their music characteristics, have been considered. Moreover, for each musical motif, different sound characteristics (i.e. different musical instruments) were considered, to consider both the rhythmic and timbre aspect.","PeriodicalId":51841,"journal":{"name":"BUILDING ACOUSTICS","volume":"27 1","pages":"311 - 331"},"PeriodicalIF":1.7,"publicationDate":"2020-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1351010X20926791","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42310627","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: 3