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Acoustic Room De Reverberation Using Time Reversal Acoustics
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Book Synopsis Acoustic Room De-reverberation Using Time-Reversal Acoustics by : David W. Liddy
Download or read book Acoustic Room De-reverberation Using Time-Reversal Acoustics written by David W. Liddy and published by . This book was released on 1999-09-01 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis probes the performance of one-channel time-reversal acoustics in a chamber in terms of the geometry of the cavity. In particular, a rectangular chamber is compared to an enclosure that has a stadium shape. The mode structure in the rectangular cavity is highly symmetric, while it is highly irregular in the stadium-shaped cavity. Time- reversal acoustic techniques produce an improved focus in the latter. The focusing quality is determined as a function of frequency, time-reversal window size, and spatial extent. A scheme for encrypted acoustic communication, both in air and underwater, that uses multiple broadband signals with identical bandwidth, Hanning window source spectra, and center frequencies separated by half the bandwidth, allowing for null detection between adjacent signals, is successfully investigated.
Book Synopsis Time Reversal Acoustics by : Woon Siong Gan
Download or read book Time Reversal Acoustics written by Woon Siong Gan and published by Springer Nature. This book was released on 2021-08-06 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights time reversal acoustics, techniques based on the symmetry properties of acoustic fields. It has the unique feature that the first eleven chapters of the book are on the indepth studies of the theories of time reversal acoustics. The remaining chapters are on the four major applications of time reversal acoustics, together with their experimental setups and case studies: underwater communication, seismic exploration,nondestructive evaluation, and medical ultrasound imaging.. The gauge invariance approach to acoustic fields, proposed by the author in 2007, is confirmed by the successful fabrication of acoustical metamaterials and the applications of time reversal acoustics to superresolution. The book also presents groundbreaking applications of time reversal acoustics to underwater communication technology and the application of metamaterials to time reversal acoustics.
Book Synopsis Theoretical Evaluation of Continuous-wave Time Reversal Acoustics in a Half-space Environment by : Blaine Harker
Download or read book Theoretical Evaluation of Continuous-wave Time Reversal Acoustics in a Half-space Environment written by Blaine Harker and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time reversal (TR) acoustics is a technique used to locate sources, using a set of transducers called a time reversal mirror (TRM) and is especially useful in reverberant environments. TR is commonly used to find acoustically small sources using a pulsed waveform. Here TR is applied to simple sources using steady-state waveforms using a straightforward, computational point source propagation theoretical model in a half-space environment. It is found that TR can effectively localize a simple source broadcasting a continuous wave, depending on the angular spacing. Furthermore, the aperture (angular coverage around the source) of the TRM is the most important parameter when creating a setup of receivers for imaging a source. This work quantifies how a TRM may be optimized when the source's location is known to be within a certain region of certainty.
Book Synopsis The Journal of the Acoustical Society of America by : Acoustical Society of America
Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2006 with total page 1350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Room Acoustics by : Heinrich Kuttruff
Download or read book Room Acoustics written by Heinrich Kuttruff and published by CRC Press. This book was released on 2016-10-03 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Well established as a classic reference and specialised textbook, since its first publication in 1973, Heinrich Kuttruff’s Room Acoustics combines detailed coverage with a state of art presentation of the theory and practice of sound behaviour in closed spaces. This sixth edition presents several additional new sections, for instance on the reflection of a spherical wave from a wall, on finite element methods for sound field calculation and on virtual reality, as well as giving an overhaul of the standard material. Particular emphasis is given to the properties and calculation of reverberation, the most obvious acoustical feature of a room. And further key topics include the various mechanisms of sound absorption and their practical application as well as scattering by wall irregularities including pseudo-stochastic structures. Extensive space is given to of psychoacoustic insights and the quality criteria derived from them, along with new procedures for the sensory assessment of concert hall acoustics. As in earlier editions, one full and updated chapter is devoted to the design and performance of electroacoustic systems which nowadays is not just a method for sound amplification but offers many possibilities for correcting acoustic deficiencies and modifying a hall’s natural acoustics.
Book Synopsis Seismic Interferometry by : Deyan Draganov
Download or read book Seismic Interferometry written by Deyan Draganov and published by SEG Books. This book was released on 2008 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including more than 70 papers, this invaluable source for researchers and students contains an editors' introduction with extensive references and chapters on seismic interferometry without equations, highlights of the history of seismic interferometry from 1968 until 2003, and offers a detailed overview of the rapid developments since 2004.
Book Synopsis Time Reversal Acoustics for Small Targets Using Decomposition of the Time Reversal Operator by : Peter C. Simko
Download or read book Time Reversal Acoustics for Small Targets Using Decomposition of the Time Reversal Operator written by Peter C. Simko and published by . This book was released on 2008 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Directions in Linear Acoustics and Vibration by : Matthew Wright
Download or read book New Directions in Linear Acoustics and Vibration written by Matthew Wright and published by Cambridge University Press. This book was released on 2010-07-26 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linear acoustics was thought to be fully encapsulated in physics texts of the 1950s, but this view has been changed by developments in physics during the last four decades. There is a significant new amount of theory that can be used to address problems in linear acoustics and vibration, but only a small amount of reported work does so. This book is an attempt to bridge the gap between theoreticians and practitioners, as well as the gap between quantum and acoustic. Tutorial chapters provide introductions to each of the major aspects of the physical theory and are written using the appropriate terminology of the acoustical community. The book will act as a quick-start guide to the new methods while providing a wide-ranging introduction to the physical concepts.
Book Synopsis Ocean Time-reversal Acoustics and Application to Reverberation Reduction by : Seongil Kim
Download or read book Ocean Time-reversal Acoustics and Application to Reverberation Reduction written by Seongil Kim and published by . This book was released on 2002 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Auditorium Acoustics and Architectural Design by : Michael Barron
Download or read book Auditorium Acoustics and Architectural Design written by Michael Barron and published by Taylor & Francis. This book was released on 1993 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern concert halls and opera houses are now very specialized buildings with special acoustical characteristics. This book is an important resource for architects, engineers and auditorium technicians.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720709992 Total Pages :30 pages Book Rating :4.7/5 (99 download)
Book Synopsis Reverberation Time Measurements in the NASA Langley Exterior Effects Room (Eer) by : National Aeronautics and Space Administration (NASA)
Download or read book Reverberation Time Measurements in the NASA Langley Exterior Effects Room (Eer) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-04 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: One-third octave band background noise and reverberation time measurements were conducted in the Exterior Effect Room (EER) at the NASA Langley Research Center. The related overall acoustic absorption of the room was calculated. The acoustic field in the room was characterized. Reverberation time measurements were performed using the integrated impulse response method. The results were compared with independent measurements using the interrupted noise reverberation time method and different instrumentation. Reasonable agreement was obtained between the reverberation times of the two methods.Grosveld, Ferdinand W.Langley Research CenterREVERBERATION; BACKGROUND NOISE; ACOUSTIC ATTENUATION; OCTAVES; ACOUSTICS; NOISE MEASUREMENT; TIME MEASUREMENT; SOUND FIELDS; ABSORPTIVITY
Book Synopsis Acoustics of Small Rooms by : Mendel Kleiner
Download or read book Acoustics of Small Rooms written by Mendel Kleiner and published by CRC Press. This book was released on 2014-04-15 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much time is spent working out how to optimize the acoustics of large rooms, such as auditoria, but the acoustics of small rooms and environments can be just as vital. The expensive sound equipment of a recording studio or the stereo in a car or living room is likewise rendered useless if the acoustic environment is not right for them.Changes in wa
Book Synopsis Acoustic Analyses Using Matlab and Ansys by : Carl Howard
Download or read book Acoustic Analyses Using Matlab and Ansys written by Carl Howard and published by CRC Press. This book was released on 2014-12-18 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the use of ANSYS finite element analysis software and MATLAB to solve acoustic problems. These range from simple textbook problems, to complex ones that can only be solved using FEA software. The book includes instructions on relevant mathematical modelling, and hints on the use of ANSYS software. The MATLAB source code provides readers with valuable tools for doing their own validations, and is available for download. The book provides practical training in the use of FEA for basic modelling and solving acoustic problems.
Book Synopsis Foundations of Engineering Acoustics by : Frank J. Fahy
Download or read book Foundations of Engineering Acoustics written by Frank J. Fahy and published by Elsevier. This book was released on 2000-09-12 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foundations of Engineering Acoustics takes the reader on a journey from a qualitative introduction to the physical nature of sound, explained in terms of common experience, to mathematical models and analytical results which underlie the techniques applied by the engineering industry to improve the acoustic performance of their products. The book is distinguished by extensive descriptions and explanations of audio-frequency acoustic phenomena and their relevance to engineering, supported by a wealth of diagrams, and by a guide for teachers of tried and tested class demonstrations and laboratory-based experiments. Foundations of Engineering Acoustics is a textbook suitable for both senior undergraduate and postgraduate courses in mechanical, aerospace, marine, and possibly electrical and civil engineering schools at universities. It will be a valuable reference for academic teachers and researchers and will also assist Industrial Acoustic Group staff and Consultants. Comprehensive and up-to-date: broad coverage, many illustrations, questions, elaborated answers, references and a bibliography Introductory chapter on the importance of sound in technology and the role of the engineering acoustician Deals with the fundamental concepts, principles, theories and forms of mathematical representation, rather than methodology Frequent reference to practical applications and contemporary technology Emphasizes qualitative, physical introductions to each principal as an entrée to mathematical analysis for the less theoretically oriented readers and courses Provides a 'cook book' of demonstrations and laboratory-based experiments for teachers Useful for discussing acoustical problems with non-expert clients/managers because the descriptive sections are couched in largely non-technical language and any jargon is explained Draws on the vast pedagogic experience of the writer
Book Synopsis Springer Handbook of Systematic Musicology by : Rolf Bader
Download or read book Springer Handbook of Systematic Musicology written by Rolf Bader and published by Springer. This book was released on 2018-03-21 with total page 1089 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique reference book offers a holistic description of the multifaceted field of systematic musicology, which is the study of music, its production and perception, and its cultural, historical and philosophical background. The seven sections reflect the main topics in this interdisciplinary subject. The first two parts discuss musical acoustics and signal processing, comprehensively describing the mathematical and physical fundamentals of musical sound generation and propagation. The complex interplay of physiology and psychology involved in sound and music perception is covered in the following sections, with a particular focus on psychoacoustics and the recently evolved research on embodied music cognition. In addition, a huge variety of technical applications for professional training, music composition and consumer electronics are presented. A section on music ethnology completes this comprehensive handbook. Music theory and philosophy of music are imbedded throughout. Carefully edited and written by internationally respected experts, it is an invaluable reference resource for professionals and graduate students alike.
Book Synopsis Nonlinear Dynamics and Chaos by : J Hogan
Download or read book Nonlinear Dynamics and Chaos written by J Hogan and published by CRC Press. This book was released on 2002-08-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear dynamics has been successful in explaining complicated phenomena in well-defined low-dimensional systems. Now it is time to focus on real-life problems that are high-dimensional or ill-defined, for example, due to delay, spatial extent, stochasticity, or the limited nature of available data. How can one understand the dynamics of such sys
Book Synopsis Handbook of Engineering Acoustics by : Gerhard Müller
Download or read book Handbook of Engineering Acoustics written by Gerhard Müller and published by Springer Science & Business Media. This book was released on 2012-11-06 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: This acoustics handbook for mechanical and architectural applications is a translation of the German standard work on the subject. It not only describes the state of art of engineering acoustics but also gives practical help to engineers for solving acoustic problems. It deals with the origin, the transmission and the methods of abatement of air-borne and structure-borne sound of different kinds, from traffic to machinery and flow induced sound.
