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Author: R. E. Klingner
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 120
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Book Description
Author: R. E. Klingner
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 120
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Book Description
Author: Selma Kurra
Publisher: John Wiley & Sons
ISBN: 1118887433
Category : Technology & Engineering
Languages : en
Pages : 864
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Book Description
Environmental Noise and Management Selma Kurra, Istanbul Technical University and dBKES Engineering Ltd, Turkey A comprehensive overview of environmental noise pollution from the standpoint of environmental impact and control Environmental noise is studied, regulated and monitored by many governments and institutions, as well as forming the basis for a number of different occupations due to the adverse effects of noise exposure. Environmental Noise and Management provides a comprehensive overview of environmental noise pollution. The book begins by covering the fundamentals of noise and acoustics, major noise sources and prediction and evaluation techniques. Developments in noise measuring techniques, and mapping and improvement of legislation to control noise pollution are then discussed, and international regulations are presented. Technological advances and recent developments regarding strategy and action plans are also covered in depth. Key features: Summarizes the relevant international standards covering noise pollution and environmental engineering practice. Presents technological advances and recent developments regarding strategy and action plans. Covers developments in noise measuring techniques, prediction models, mapping and improvement of legislation to control noise pollution. Environmental Noise and Management is a comprehensive resource for researchers and graduate students who are involved in noise pollution from the standpoint of environmental impact and control.
Author: R. E. Klingner
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 102
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Book Description
Author: Kirk A. Askew
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 140
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Book Description
Author: Ronald A. Peron
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 120
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Book Description
Author: Paul N. Roschke
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 184
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Book Description
This report documents a study of the feasibility of using soundwalls constructed of recycled plastics in place of conventional building materials. Important considerations in selecting materials used in this study include: environmental impact, acoustics, aesthetics, performance, safety, and cost. Various recycled materials were solicited from commercial manufacturers and subjected to a number of laboratory and field tests. These tests include three-point bending tests, impact hammer excitations, and exposure to different types of weather. Based on those results, several of the most promising materials were selected for construction of a full-scale field installation of a test section of a soundwall. This field section was monitored for a period of one year for response to environmental factors such as wind and exposure to ultraviolet radiation. Analysis of the field structure includes system identification of dynamic characteristics, finite element simulation, and acoustic performance. Results show that noise insertion loss of the soundwall is exceptional. Structurally, the prototype soundwall performed adequately over the course of the project with only a few members showing detrimental effects from the harsh thermal environment. System identification and experimental analysis of test data were successfully implemented and indicate that the prototype soundwall is moderately wind sensitive. A finite element model of the soundwall was developed to simulate both static and dynamic response to loads. Using methods of modal superposition and random response, deflection was predicted for the top of the wall due to application of a strong wind event.
Author: Cori Vanchieri
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
"EXECUTIVE SUMMARY: At highway speeds, the major source of noise is the interaction between tires and the road surface. Noise barriers have been used by state transportation departments for many years and are the preferred solution for reducing highway traffic noise. Federal Highway Administration regulations for highway traffic and construction noise abatement are included in the Code of Federal Regulations (23 CFR772)1 and currently only consider noise barriers as an abatement measure for highway noise. However, pavement type can considerably reduce the noise generated from tire-road interaction. Yet considering pavement as a noise abatement measure is currently only allowed for pilot projects approved by the Federal Highway Administration. Through the end of 2010, 47 state departments of transportation and the Commonwealth of Puerto Rico have constructed more than 2,748 linear miles of barriers at a cost of close to 5 .5 billion (in 2010 dollars)2 . Treatment of highway pavement is generally less costly than the construction of barriers, but the noise reduction achieved by a quieter pavement is typically less than the reduction from a well-designed barrier, at least for residents in the immediate vicinity of the barrier. However, quieter pavements produce a reduction of noise at the source, which means that it may be possible to increase the number of benefited receptors (the recipient of an abatement measure that receives a noise reduction at or above the highway agency's chosen noise impact threshold value). A combination of barrier and pavement treatment may lead to cost-effective solutions to highway noise. To evaluate effectiveness of quieter pavements, a reliable measurement method for tire/road noise is needed. The method that is currently favored is measuring On-Board Sound Intensity (OBSI). OBSI data are collected in conformance with AASHTO TP-76,3 the American Association of State Highway and Transportation Officials Standard Method of Test for Measurement of Tire/Pavement Noise Using the On-Board Sound Intensity (OBSI) Method. A workshop on cost-benefit analysis of noise barriers and quieter pavements was held on January 16, 2014. One objective of the workshop was to evaluate the National Cooperative Highway Research Program Report 738, "Evaluating Pavement Strategies and Barriers for Noise Mitigation". Report 738 was prepared under Project 10-76, and is typically referred to as NCHRP 10-76.4 The report describes a methodology for the evaluation of both barriers and pavements for noise abatement, and explores how quieter pavement technology can be incorporated into Federal and state noise policy. Three key elements of the method presented in NCHRP 10-76 involve life cycle cost analysis (LCCA), the use of a research version5 of the Federal Highway Administration Traffic Noise Model (TNM), and a method for the evaluation of tire pavement noise reduction, OBSI. This report contains summaries of the presentations given during the workshop and the results of discussions identifying the challenges presented by implementing the NCHRP 10-76 methodology, especially to state departments of transportation, which carry out noise abatement projects in cooperation with the Federal Highway Administration and in conformance with the federal requirements in 23 CFR772. Using LCCA, planners can evaluate the initial cost of abatement using pavement and barriers as well as rehabilitation and maintenance costs. The methodology also incorporates a measure of the effectiveness of the resulting predicted level of traffic noise. Current regulations require impact determination and barrier design to be completed with the public-release version of TNM and average pavement. By using a research version of TNM and OBSI data to refine the tire-pavement interaction noise source, pavement effects could be included in the model (and therefore predictions could be more accurate and pavement type can be considered when assessing noise impact and abatement). Several examples illustrated that the NCHRP 10-76 approach can be successfully applied to real highway project studies. In some situations, a barrier-and-pavement hybrid solution can be more acoustically effective and/or cost effective than a barrier only solution and can allow for additional benefited receptors where a barrier only solution would not be feasible and/or reasonable. Both current regulations and the public- release version of TNM require modification if the noise reduction benefits of pavements are to be realized in construction projects. The noise reduction achieved by sound propagation over sound-absorptive pavement could also be included in the public-release version of TNM. An important part of the workshop, which was attended by noise barrier and pavement experts, as well as representatives from the FHWA and state departments of transportation, was to discuss the challenges of implementing NCHRP 10-76 methodology to state departments of transportation and to develop findings and recommendations based on these discussions. The key elements of these discussions are presented in Chapter 3 of this report. The following recommendations appear in Chapter 4 of this report: Develop and document a noise evaluation process that accounts for both noise barriers and quieter pavements. Provide funding and implement the method presented to evaluate the abatement options on a pilot program basis to help evaluate and improve the process. Upgrade the public release version of TNM to include the OBSI-related pavement assessment capabilities currently available in the research version of TNM. Organize and make publically available national databases for OBSI and LCCA. Expand TNM and highway noise abatement training to include consideration of quieter pavements and enable use of the research version of TNM. Encourage FHWA to develop guidance on the use of quieter pavements and barriers for noise abatement. Incorporate noise performance into a new performance management system. Develop and provide a noise abatement training program for pavement engineering staff. Other presentations from the workshop with important background information relevant to cost benefit analysis, noise barriers, and quieter pavements are summarized in Appendix A. The workshop agenda, the names of the participants, definitions of terms and a list of acronyms are provided in Appendix B, Appendix C, and Appendix D."
Author: University of Texas at Austin. Center for Transportation Research
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Kristopher Harbin
Publisher:
ISBN:
Category : Noise barriers
Languages : en
Pages : 0
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Book Description
This guidebook seeks to provide guidance on the sequencing and placement of noise walls and retaining walls on TxDOT projects. This includes recommendations for noise wall and retaining wall selection, preferred methods and best practices for sequencing and placement, and design and construction procedures to help reduce issues during construction and maintenance. The guidebook was developed based on information collected from stakeholder interviews, data analysis, and case studies regarding sequencing and placement of noise walls and retaining walls. It focuses on a how-to approach and includes guidelines and best practices for the sequencing and placement of noise walls and retaining walls. The guidebook includes information for a variety of users and stakeholders and can be grouped into six general areas: design, environmental, utility coordination, right of way, construction, and maintenance. These six areas have a variety of stakeholders for each.
Author: Douglas M. Marshall
Publisher: CRC Press
ISBN: 113802693X
Category : Political Science
Languages : en
Pages : 1944
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Book Description
The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.
