Acoustics Australia最新文献_第9页

Classifying Sound: A Tool to Enrich Intangible Heritage Management 声音分类:丰富非物质遗产管理的工具

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-11-06 DOI: 10.1007/s40857-021-00257-y

Murray Parker, Dirk H. R. Spennemann

引用次数: 6

Acoustics Australia 声学澳大利亚

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-10-13 DOI: 10.1007/s40857-021-00254-1

引用次数: 0

A Helmholtz Resonator-Based Acoustic Metamaterial for Power Transformer Noise Control 基于亥姆霍兹谐振腔的电力变压器噪声控制声学超材料

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-10-07 DOI: 10.1007/s40857-021-00256-z

Naser Sharafkhani

引用次数: 6

Passage of Monochromatic Sound Through a Gas Pipeline Wall 单色声音通过燃气管道壁的通道

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-09-29 DOI: 10.1007/s40857-021-00255-0

A. V. Lun-Fu, M. A. Bubenchikov, A. M. Bubenchikov, D. V. Mamontov

引用次数: 0

Noise Exposure and its Effects on the Hearing of Indoor Cycling Instructors 噪声暴露及其对室内自行车指导员听力的影响

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-09-13 DOI: 10.1007/s40857-021-00251-4

Marcos Vinícius Soares Martins, Karina Mary de Paiva, Eriberto Oliveira do Nascimento, Bruno Sérgio Portela, Danúbia Hillesheim, Paulo Henrique Zannin

{"title":"Noise Exposure and its Effects on the Hearing of Indoor Cycling Instructors","authors":"Marcos Vinícius Soares Martins, Karina Mary de Paiva, Eriberto Oliveira do Nascimento, Bruno Sérgio Portela, Danúbia Hillesheim, Paulo Henrique Zannin","doi":"10.1007/s40857-021-00251-4","DOIUrl":"10.1007/s40857-021-00251-4","url":null,"abstract":"<div><p>To ascertain the influence of occupational exposure to SPL on the hearing threshold of indoor cycling (IC) instructors. This is a cross-sectional study involving eleven IC instructors at fitness centers in Guarapuava, PR, Brazil Questionnaires were applied to assess occupational characteristics and reported auditory and extra-auditory symptoms. The hearing threshold was evaluated by pure tone audiometry testing at seven moments: after 14 h of acoustic rest, and before and immediately after exposure to SPLs of 95, 85 and 75 dB(A), making a total of 77 measurements of the group of instructors. Differences in means were assessed using the Kruskal–Wallis test. The k-means and composition method was applied using principal component analysis to verify the main factors associated with the broadband multi-frequency measurement at the hearing threshold. The average bilateral hearing threshold showed a significant increase at the intensity of 95 dB(A), at all the tested frequencies (<i>p</i> < 0.05) and at most of the frequencies, at 85 dB(A). Conclusions exposure to the equivalent sound pressure levels of 85 dB(A) and 95 dB(A) significantly altered the average hearing threshold of indoor cycling instructors.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"50 1","pages":"139 - 147"},"PeriodicalIF":1.7,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50025068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Band Gap Mechanism and Design of a New Type of Six-Ligament Chiral Structure 一种新型六韧带手性结构的带隙机理及设计

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-08-27 DOI: 10.1007/s40857-021-00249-y

Yajun Xin, Ran Wang, Yongtao Sun, Qian Ding, Shuliang Cheng

引用次数: 2

Enhanced wideband low-frequency sound absorption of a single-layer multiple parallel-arranged inhomogeneous microperforated panel absorber 单层多层并联非均匀微孔板吸声器的宽带低频吸声性能研究

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-08-26 DOI: 10.1007/s40857-021-00252-3

Faisal Rafique, Jiu Hui Wu, Syed Murawat Abbas Naqvi, Fuyin Ma

{"title":"Enhanced wideband low-frequency sound absorption of a single-layer multiple parallel-arranged inhomogeneous microperforated panel absorber","authors":"Faisal Rafique, Jiu Hui Wu, Syed Murawat Abbas Naqvi, Fuyin Ma","doi":"10.1007/s40857-021-00252-3","DOIUrl":"10.1007/s40857-021-00252-3","url":null,"abstract":"<div><p>A single layer of four parallel-arranged inhomogeneous microperforated panels (iMPP) absorber is proposed to achieve low-frequency sound absorption and wider frequency bandwidth. The hole diameter of the four parallel-arranged iMPP is set to be equal to or less than 1 mm. The theoretical formula for calculating the absorption coefficient under normal incident sound is established based on an electrical equivalent circuit model (ECM). The parametric study has been performed on the MATLAB software, and the expected results are obtained. The results indicate that the proposed model can produce a wider absorption bandwidth of 195–455 Hz in the low-frequency region with an average absorption coefficient of more than 90% (<i>α</i> = 0.91). To achieve the desired effect, the absorption coefficient and the bandwidth can be tuned by adjusting the aperture size, perforation ratio, thickness of iMPP with depth and width of the back cavity. Also, it is found that iMPP can produce wider bandgaps with good absorption peaks in the low-frequency region by designing sub-MPP of smaller hole diameter, large perforation ratio, and with large cavity depths and the sub-MPP of large hole diameter, small perforation ratio, and with short cavity depths. The finite element method has been employed on COMSOL Multiphysics 5.5a to simulate the acoustic absorption performance of the model and compared with the ECM-based predicted and square impedance tube-based experimental results. Compared with other homogeneous MPPs of different arrangements, this absorber provides exceptional absorption performance in a low-frequency range due to its lightweight structure, and convenient manufacturing availability, this enhanced form of iMPP absorber has great potential in acoustics and noise control applications.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"50 1","pages":"49 - 69"},"PeriodicalIF":1.7,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50102889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Directional Response of a Horizontal Linear Array to an Acoustic Source at Close Range in Deep Water 深水中近距离水平线性阵列对声源的方向响应

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-08-18 DOI: 10.1007/s40857-021-00250-5

Yanqun Wu, Wen Zhang, Zhengliang Hu, Weihua Zhang, Bingbing Zhang, Jun Wang, Wei Guo, Guojun Xu, Min Zhu

{"title":"Directional Response of a Horizontal Linear Array to an Acoustic Source at Close Range in Deep Water","authors":"Yanqun Wu, Wen Zhang, Zhengliang Hu, Weihua Zhang, Bingbing Zhang, Jun Wang, Wei Guo, Guojun Xu, Min Zhu","doi":"10.1007/s40857-021-00250-5","DOIUrl":"10.1007/s40857-021-00250-5","url":null,"abstract":"<div><p>During an experiment conducted in the deep South China Sea, a bottom-mounted horizontal linear array (HLA) collected the radiated noise from a moving cooperative ship at a distance less than 13 km. Bearing-time records of the HLA through plane-wave beamforming showed significant bearing estimation errors and two or three split bearing tracks of the ship that leads to misjudgment of target numbers. To reveal the physics underlying the experimental phenomena, the directional response of the HLA to an acoustic source at close range was developed by normal mode theory. Numerical simulations were conducted to analyze the acoustic intensity distribution characteristics and the arrival structures of the acoustic field. Comparative results of beamforming obtained with normal mode and ray theory show that the ray model provides an easy way to predict the split bearings for HLA beamforming. When sources are near the endfire of the array, significant bearing estimation errors and the beam splitting effect for a large aperture array were the main issues. For sources near the broadside of the array, the beam broadening effect was the most significant concern. The effect of the array length on the beamforming anomalies and the array gain loss was also investigated. With the present theories, the HLA beamforming anomalies during the experiment were well explained.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"50 1","pages":"91 - 103"},"PeriodicalIF":1.7,"publicationDate":"2021-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s40857-021-00250-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50035475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Evaluation of Cognitive Performance of City Bus Drivers with Respect to Noise and Vibration Exposure 城市公交车驾驶员对噪声和振动暴露的认知性能评价

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-07-22 DOI: 10.1007/s40857-021-00248-z

Ramin Rahmani, Mohsen Aliabadi, Rostam Golmohammadi, Mohammad Babamiri, Maryam Farhadian

{"title":"Evaluation of Cognitive Performance of City Bus Drivers with Respect to Noise and Vibration Exposure","authors":"Ramin Rahmani, Mohsen Aliabadi, Rostam Golmohammadi, Mohammad Babamiri, Maryam Farhadian","doi":"10.1007/s40857-021-00248-z","DOIUrl":"10.1007/s40857-021-00248-z","url":null,"abstract":"<div><p>During daily work, bus drivers are exposed to various environmental factors, and their mental responses to these risk factors are still poorly understood. This study aimed to investigate the cognitive performance of bus drivers with respect to noise and vibration exposure. The study was conducted in 103 healthy city bus drivers. Based on their work schedule, the drivers' exposure to noise and vibration was measured using the Svantek SV 104 noise dosimeter and the SV 106 vibration meter, respectively. The simple Stroop test was used to measure drivers' selective attention capacity and skills as cognitive performance indicators. Drivers' job stress was determined using a standard questionnaire. The drivers' exposure levels to noise, whole-body vibration, and hand-arm vibration was 79.50 ± 3.51 dB, 0.620 ± 0.159 m/s<sup>2</sup>, and 0.438 ± 0.064 m/s<sup>2</sup>, respectively. Significant differences were observed in the interference score (IS) and interference time (IT) after driving (<i>p</i> < 0.05), which indicates a decrease in the number of true responses and an increase in response time. The multiple linear regression model showed that noise and vibration, as main environmental stressors in the presence of other individual's covariates such as age, work experience, and job stress, have significant effects on cognitive performance based on changes in IS and IT during driving (model accuracy; <i>r</i> = 0.61 and <i>r</i> = 0.57). The traffic load was also significantly associated with changes in IS and IT (<i>p</i> < 0.05). The possibility of mental function loss while driving indicates that appropriate occupational health surveillance must be implemented for bus driving occupations.</p></div>","PeriodicalId":54355,"journal":{"name":"Acoustics Australia","volume":"49 3","pages":"529 - 539"},"PeriodicalIF":1.7,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s40857-021-00248-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50101769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

The Effects of Hydrophone End-Cap Extension on the Flow-Generated Noise 水听器端盖扩展对流动噪声的影响

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2021-07-05 DOI: 10.1007/s40857-021-00247-0

Guan Guan, Zhengmao Zhuang, Qu Yang

引用次数: 1