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Transmission Loss Of Silencers With Flow From A Flow Impedance Tube Using Burst Signals
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Book Synopsis Transmission Loss of Silencers with Flow from a Flow-impedance Tube Using Burst Signals by : Hyunsu Kim
Download or read book Transmission Loss of Silencers with Flow from a Flow-impedance Tube Using Burst Signals written by Hyunsu Kim and published by . This book was released on 2011 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Acoustic performance of silencers is typically characterized by transmission loss both in the absence and presence of mean flow. The effects of flow on the acoustic characteristics of silencers, however, are not clearly established due to lack of appropriate experimental setups. In addressing this need, the present study develops a flow-impedance tube setup using burst signals for the transmission loss measurement in the presence of flow. By incorporating burst-signal separation with a long tube, an anechoic termination on the downstream side is achieved by separating the transmitted and reflected waves in time domain. Burst sine or burst random is used to enhance the signal-to-noise ratio. By applying wave decomposition in frequency domain on the upstream side, incident waves of the burst signals are effectively obtained. Also discussed in this study are (1) microphone calibration, (2) time domain editing functions, and (3) hydraulic losses either to improve the accuracy or the capacity of the transmission loss setup in the presence of flow. Using the new experimental setup, the effect of flow on various silencers is investigated. The acoustic performance of a Helmholtz resonator is shown to change dramatically in the presence of flow with an increase in the peak transmission loss frequency and a decrease in the magnitude. These varying acoustic characteristics of the Helmholtz resonator with flow are then explained using the lumped parameter model. Complex acoustic behavior of a dual Helmholtz resonator, a turbocharger resonator, and a Helmholtz resonator with leakage are also illustrated first without flow theoretically. The flow effect is then examined on these silencers as well as some additional key silencers such as expansion chamber, perforated tube silencers, and dissipative silencers using the flow-impedance tube setup. Hence, the primary contributions of the present study include (1) the development of methodologies for the transmission loss measurement in the presence of flow by implementing a flow-impedance tube setup and (2) the investigation of the acoustic performance of various silencers subject to flow, thereby establishing the impact of flow on their behavior which, in turn, is expected to provide guidelines toward their design.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1996 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Sound-Power Flow by : Robert Hickling
Download or read book Sound-Power Flow written by Robert Hickling and published by Morgan & Claypool Publishers. This book was released on 2017-01-01 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sound-Power Flow: A practitioner's handbook for sound intensity is a guide for practitioners and research scientists in different areas of acoustical science. There are three fundamental quantities in acoustics: sound pressure, sound particle velocity, and sound intensity. This book is about sound intensity and demonstrates the advantages and uses of acoustical sensing compared with other forms of sensing. It describes applications such as: measuring total sound power; directional hearing of humans and mammals; echolocation; measuring sound-power flow in ducts; and uses of non-contact, focused, high-frequency, pulse-echo ultrasonic probes. This book presents computational approaches using standard mathematics, and relates these to the measurement of sound-power flow in air and water. It also uses linear units rather than logarithmic units – this making computation in acoustics simpler and more accessible to advanced mathematics and computing. The book is based on work by the author and his associates at General Motors, the University of Mississippi, and Sonometrics.
Book Synopsis Catalogue by : International Organization for Standardization
Download or read book Catalogue written by International Organization for Standardization and published by . This book was released on 1997 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Valve Selection Handbook by : Peter Smith
Download or read book Valve Selection Handbook written by Peter Smith and published by Elsevier. This book was released on 2004-01-24 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Valves are the components in a fluid flow or pressure system that regulate either the flow or the pressure of the fluid. They are used extensively in the process industries, especially petrochemical. Though there are only four basic types of valves, there is an enormous number of different kinds of valves within each category, each one used for a specific purpose. No other book on the market analyzes the use, construction, and selection of valves in such a comprehensive manner. Covers new environmentally-conscious equipment and practices, the most important hot-button issue in the petrochemical industry today Details new generations of valves for offshore projects, the oil industry's fastest-growing segment Includes numerous new products that have never before been written about in the mainstream literature
Book Synopsis Acoustics of Ducts and Mufflers by : M. L. Munjal
Download or read book Acoustics of Ducts and Mufflers written by M. L. Munjal and published by John Wiley & Sons. This book was released on 2014-02-04 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance Engine exhaust noise pollutes the street environment and ventilation fan noise enters dwellings along with fresh air. People have become conscious of their working environment. Governments of most countries have responded to popular demand with mandatory restrictions on sound emitted by automotive engines, and a thorough knowledge of acoustics of ducts and mufflers is needed for the design of efficient muffler configurations. This fully updated Second Edition of Acoustics of Ducts and Mufflers deals with propagation, reflection and dissipation/absorption of sound along ducts/pipes/tubes, area discontinuities, perforated elements and absorptive linings that constitute the present-day mufflers and silencers designed to control noise of exhaust and intake systems of automotive engines, diesel-generator sets, compressors and HVAC systems. It includes equations, figures, tables, references, and solved examples and unsolved exercises with answers, so it can be used as a text book as well as a reference book. It also offers a complete presentation and analysis of the major topics in sound suppression and noise control for the analysis and design of acoustical mufflers, air conditioning and ventilation duct work. Both the fundamentals and the latest technology are discussed, with an emphasis on applications. Deals with reactive mufflers, dissipative silencers, the frequency-domain approach, and the time-domain approach. Fully updated second edition of the premier reference book on muffler and lined duct acoustical performance, in one complete volume Presents original new research on topics including baffle silencers and louvers, 3D analytical techniques, and flow-acoustic analysis of multiply-connected perforated-element mufflers Includes a general design procedure to help muffler designers in the automotive industry, exhaust noise being a major component of automobile and traffic noise pollution Written by an expert with four decades’ experience in teaching to graduate students, publishing extensively in reputed international journals, and consulting with industry for noise control as well as designing for quietness
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1972 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic Absorbers and Diffusers by : Trevor J. Cox
Download or read book Acoustic Absorbers and Diffusers written by Trevor J. Cox and published by CRC Press. This book was released on 2009-01-26 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Absorbers and diffusers are two of the main design tools for altering the acoustic conditions of rooms, semi-enclosed spaces and the outdoor environment. Their correct use is important for delivering high quality acoustics. Unique and authoritative, this book decribes how to effectively measure, model, design and apply diffusers and absorbers. It is a resource for new and experienced acousticians, seeking an understanding of the evolution, characteristics and application of modern diffusers. Absorption is a more established technology and so the book blends traditional designs with modern developments. The book covers practical and theoretical aspects of absorbers and diffusers and is well illustrated with examples of installations and case studies. This new edition brings Acoustic Absorbers and Diffusers up-to-date with current research, practice and standards. New developments in measurement, materials, theory and practice since the first edition (published in 2004) are included. The sections on absorbers are extended to include more about noise control.
Book Synopsis Digital Underwater Acoustic Communications by : Lufen Xu
Download or read book Digital Underwater Acoustic Communications written by Lufen Xu and published by Academic Press. This book was released on 2016-09-16 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Underwater Acoustic Communications focuses on describing the differences between underwater acoustic communication channels and radio channels, discusses loss of transmitted sound in underwater acoustic channels, describes digital underwater acoustic communication signal processing, and provides a comprehensive reference to digital underwater acoustic communication equipment. This book is designed to serve as a reference for postgraduate students and practicing engineers involved in the design and analysis of underwater acoustic communications systems as well as for engineers involved in underwater acoustic engineering. Introduces the basics of underwater acoustics, along with the advanced functionalities needed to achieve reliable communications in underwater environment Identifies challenges in underwater acoustic channels relative to radio channels, underwater acoustic propagation, and solutions Shows how multi-path structures can be thought of as time diversity signals Presents a new, robust signal processing system, and an advanced FH-SS system for multimedia underwater acoustic communications with moderate communication ranges (above 20km) and rates (above 600bps) Describes the APNFM system for underwater acoustic communication equipment (including both civil and military applications), to be employed in active sonar to improve its performance
Book Synopsis Fundamentals of Noise and Vibration Analysis for Engineers by : M. P. Norton
Download or read book Fundamentals of Noise and Vibration Analysis for Engineers written by M. P. Norton and published by Cambridge University Press. This book was released on 2003-10-16 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noise and Vibration affects all kinds of engineering structures, and is fast becoming an integral part of engineering courses at universities and colleges around the world. In this second edition, Michael Norton's classic text has been extensively updated to take into account recent developments in the field. Much of the new material has been provided by Denis Karczub, who joins Michael as second author for this edition. This book treats both noise and vibration in a single volume, with particular emphasis on wave-mode duality and interactions between sound waves and solid structures. There are numerous case studies, test cases, and examples for students to work through. The book is primarily intended as a textbook for senior level undergraduate and graduate courses, but is also a valuable reference for researchers and professionals looking to gain an overview of the field.
Book Synopsis Noise and Vibration Control by : Leo Leroy Beranek
Download or read book Noise and Vibration Control written by Leo Leroy Beranek and published by McGraw-Hill Companies. This book was released on 1971 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1981 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Industrial Noise Control and Acoustics by : Randall F. Barron
Download or read book Industrial Noise Control and Acoustics written by Randall F. Barron and published by CRC Press. This book was released on 2002-11-14 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compiling strategies from more than 30 years of experience, this book provides numerous case studies that illustrate the implementation of noise control applications, as well as solutions to common dilemmas encountered in noise reduction processes. It offers methods for predicting the noise generation level of common systems such as fans, motors, c
Book Synopsis Bibliography of Technical Reports by :
Download or read book Bibliography of Technical Reports written by and published by . This book was released on 1949 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Springer Handbook of Acoustics by : Thomas Rossing
Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
