Noise & Health最新文献_第9页

A model for near-perfect transmission through lossy media with acoustic sources 有声源的损耗介质近乎完美传输模型

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0071

Nathan Geib, S. Wallen, M. Haberman, Christina J. Naify

{"title":"A model for near-perfect transmission through lossy media with acoustic sources","authors":"Nathan Geib, S. Wallen, M. Haberman, Christina J. Naify","doi":"10.3397/nc_2023_0071","DOIUrl":"https://doi.org/10.3397/nc_2023_0071","url":null,"abstract":"Acoustic metamaterials exhibit effective material properties not found in naturally occurring media, and, as such, have received considerable attention for their potential applications in noise and vibration control, diagnostic imaging, and nonreciprocal transmission. Complementary\u0000 acoustic metamaterials have been proposed as a means of compensating for the high impedance mismatches of aberrating layers that disrupt the acoustic field and hence distort acoustic images. More recently, a complementary acoustic metamaterial featuring active components was shown in principal\u0000 to compensate for both the impedance mismatch and energy attenuation of lossy materials, but a physical realization of the concept has not yet been implemented. Here, we present results from a one-dimensional acoustic model showing how a plane wave incident on a lossy material can be augmented\u0000 by point monopole and dipole sources to allow for near perfect transmission, thus rendering the lossy medium acoustically transparent. We present general expressions for source magnitudes that are dimensionless with respect to frequency, material thickness, and the background medium. We show\u0000 that these results are consistent with three-dimensional finite element simulations, where the appropriate monopolar and dipolar forces are generated using finite dimensional velocity sources with real loudspeaker characteristics mounted in an acoustic waveguide.","PeriodicalId":19195,"journal":{"name":"Noise & Health","volume":"126 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75368778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of sound radiation using reconstructed acoustic free velocity sources 利用重建声自由速度源预测声辐射

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0057

Xin Yan, D. Herrin

引用次数: 0

Tradeoff between mass sensitivity and performance in quasi-zero stiffness vibration isolators 准零刚度隔振器质量灵敏度与性能的权衡

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0139

P. Gilmore, U. Gandhi, S. M. S. Shaihan, R. Rangarajan

引用次数: 0

Validation of utility and transportation noise modeling 验证公用事业和交通噪音模型

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0028

M. Conaway, Joseph A. Keefe

引用次数: 0

Towards high-quality X-59 sonic thump measurements 迈向高品质的X-59音波测量

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0144

Mark C. Anderson, K. Gee, J. Durrant, A. Loubeau

引用次数: 0

Statistical energy analysis simulation of an air-handling cabinet 空气处理柜的统计能量分析仿真

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0070

Matt Smither, D. Herrin

引用次数: 0

Sound attenuation by acoustic metamaterials applied to kitchen hoods 应用于厨房通风柜的声学超材料的声音衰减

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0044

Jeremy Plé, Tenon Charly Kone, Alla Eddine Benchikh Lehocine, R. Panneton

{"title":"Sound attenuation by acoustic metamaterials applied to kitchen hoods","authors":"Jeremy Plé, Tenon Charly Kone, Alla Eddine Benchikh Lehocine, R. Panneton","doi":"10.3397/nc_2023_0044","DOIUrl":"https://doi.org/10.3397/nc_2023_0044","url":null,"abstract":"In a society where the vast majority of people spend their time inside buildings or vehicles, the need to filter the air is essential to ensure a certain level of comfort. The integration of air exchanger systems in these enclosed spaces generates noise pollution which can deteriorate\u0000 the quality of the air. Thus, controlling the noise generated by these systems becomes a major challenge for the construction industry. Recent traditional solutions such as acoustic sonic crystals only allow high frequency noise control. One solution is the incorporation of inner structured\u0000 acoustic materials for the control of low frequency transmission. This paper proposes a coupling of sonic crystals and structural acoustic materials for the control of sound transmission at low and high frequencies. To achieve this, research and simulations of the acoustic properties of various\u0000 metamaterial models under the COMSOL software were established as well as a system of the selected solutions, using the transfer matrix method. Experimental impedance tube analyses are being carried out for varying geometries, along with a fabrication method for prototyping.","PeriodicalId":19195,"journal":{"name":"Noise & Health","volume":"278 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83072462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation and mitigation of outdoor live music 户外现场音乐的评估和缓解

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0078

H. Singleton

引用次数: 0

Vibration Isolation with Spring Supported Concrete Floating Floors on Fitness Centers 健身中心弹簧支撑混凝土浮动楼板隔振

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0090

Omer F. Tigli, M. Royvaran

{"title":"Vibration Isolation with Spring Supported Concrete Floating Floors on Fitness Centers","authors":"Omer F. Tigli, M. Royvaran","doi":"10.3397/nc_2023_0090","DOIUrl":"https://doi.org/10.3397/nc_2023_0090","url":null,"abstract":"Spring-supported concrete floating floors are often used as a high-end solution to mitigate noise and vibration disturbances in fitness centers. Suppliers of these floors typically provide impressive sound test results, but information regarding their low-frequency vibration isolation\u0000 capabilities is scarce. In this study, the authors collected in-situ vibration data from an existing fitness center equipped with a 4-in (102-mm) thick spring-supported concrete floating floor while conducting various activities such as running on a treadmill, dropping a dumbbell, putting\u0000 down a barbell and slamming a medicine ball on the floor. Frequency measurements revealed that entrapped air led to an increase in the natural frequency of the floating floor. The data demonstrated that floating slab effectively isolated noise and high-frequency vibrations, but was not able\u0000 to isolate low-frequency vibrations. Additionally, a finite element model of the structure was developed, incorporating the floating floor and the base structural slab. The model was used to simulate treadmill running and weight drops, and calculated vibration levels were presented as heat\u0000 maps across the entire floor. The model's predictions aligned closely with the actual measurements, demonstrating that vibration analysis based on finite element models is a valuable method to design effective mitigation strategies for fitness centers.","PeriodicalId":19195,"journal":{"name":"Noise & Health","volume":"12 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85404375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Air vent shape optimization with metamaterials. 利用超材料优化通风口形状。

IF 0.7 4区医学

Noise & Health Pub Date : 2023-05-25 DOI: 10.3397/nc_2023_0111

Marco Lizotte, R. Panneton, J. Piaud

{"title":"Air vent shape optimization with metamaterials.","authors":"Marco Lizotte, R. Panneton, J. Piaud","doi":"10.3397/nc_2023_0111","DOIUrl":"https://doi.org/10.3397/nc_2023_0111","url":null,"abstract":"Heating, Ventilation and Air Conditioning (HVAC), are crucial in every building for the well being of the occupants. While these equipments take care of the air quality with exhausting polluted air out and bringing fresh air in, they can let a polluant in: noise. Noise can have non-physical\u0000 effects like disturbed sleep, cognitive problems or even influences on heart diseases. Recent developments in the acoustic field shown the use of metamaterials that can reduce noise while keeping good ventilation. The sonic crystals, disposed in a certain pattern following the Bragg's law,\u0000 can be tuned to reduce noise on a wide frequency band. The design of an air vent, known as a metacage, was made by using open source numerical simulations. Based on a numerical plan and optimization methods, this study's goal was to find the optimal solution for the HVAC to reduce noise while\u0000 minimizing ventilation loss. Following the simulations results, the metacage generated was 3D printed for validation in the laboratory, showing the corroboration with the simulations. The final results show third-octave bands with a TL peak over 10dB and an average of 3dB for all the others\u0000 bands up to 10kHz. All this while keeping minimal ventilation loss.","PeriodicalId":19195,"journal":{"name":"Noise & Health","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82095622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0