Springer Handbook of Acoustics
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Nonlinear Acoustics Applied to Nondestructive Testing
TO NONDESTRUCTIVE TESTING NONDESTRUCTIVE TO APPLIED ACOUSTICS NONLINEAR ABSTRACT Sensitive nonlinear acoustic methods are suitable But it is in general difficult to limit the geometrical for material characterization. This thesis describes extent of low-frequency acoustic waves. A techni- NONLINEAR ACOUSTICS APPLIED three nonlinear acoustic methods that are proven que is presented that constrains the wave field to useful for detection of defects like cracks and de- a localized trapped mode so that damage can be TO NONDESTRUCTIVE TESTING laminations in solids. They offer the possibility to located. use relatively low frequencies which is advanta- geous because attenuation and diffraction effects Keywords: nonlinear acoustics, nondestructive tes- are smaller for low frequencies. Therefore large ting, activation density, slow dynamics, resonance and multi-layered complete objects can be investi- frequency, nonlinear wave modulation spectros- gated in about one second. copy, harmonic generation, trapped modes, open Sometimes the position of the damage is required. resonator, sweep rate. Kristian Haller Kristian Haller Blekinge Institute of Technology Licentiate Dissertation Series No. 2007:07 2007:07 ISSN 1650-2140 School of Engineering 2007:07 ISBN 978-91-7295-119-8 Nonlinear Acoustics Applied to NonDestructive Testing Kristian Haller Blekinge Institute of Technology Licentiate Dissertation Series No 2007:07 ISSN 1650-2140 ISBN 978-91-7295-119-8 Nonlinear Acoustics Applied to NonDestructive Testing Kristian Haller Department of Mechanical Engineering School of Engineering Blekinge Institute of Technology SWEDEN © 2007 Kristian Haller Department of Mechanical Engineering School of Engineering Publisher: Blekinge Institute of Technology Printed by Printfabriken, Karlskrona, Sweden 2007 ISBN 978-91-7295-119-8 Acknowledgements This work was carried out at the Department of Mechanical Engineering, Blekinge Institute of Technology, Karlskrona, Sweden. -
Research on the History of Modern Acoustics François Ribac, Viktoria Tkaczyk
Research on the history of modern acoustics François Ribac, Viktoria Tkaczyk To cite this version: François Ribac, Viktoria Tkaczyk. Research on the history of modern acoustics. Revue d’Anthropologie des Connaissances, Société d’Anthropologie des Connaissances, 2019, Musical knowl- edge, science studies, and resonances, 13 (3), pp.707-720. 10.3917/rac.044.0707. hal-02423917 HAL Id: hal-02423917 https://hal.archives-ouvertes.fr/hal-02423917 Submitted on 26 Dec 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. RESEARCH ON THE HISTORY OF MODERN ACOUSTICS Interview with Viktoria Tkaczyk, director of the Epistemes of Modern Acoustics research group at the Max Planck Institute for the History of Science, Berlin François Ribac S.A.C. | « Revue d'anthropologie des connaissances » 2019/3 Vol. 13, No 3 | pages 707 - 720 This document is the English version of: -------------------------------------------------------------------------------------------------------------------- François Ribac, « Recherche en histoire de l’acoustique moderne », Revue d'anthropologie -
Linear and Nonlinear Waves
Scholarpedia, 4(7):4308 www.scholarpedia.org Linear and nonlinear waves Graham W. Griffithsy and William E. Schiesser z City University,UK; Lehigh University, USA. Received April 20, 2009; accepted July 9, 2009 Historical Preamble The study of waves can be traced back to antiquity where philosophers, such as Pythagoras (c.560-480 BC), studied the relation of pitch and length of string in musical instruments. However, it was not until the work of Giovani Benedetti (1530-90), Isaac Beeckman (1588-1637) and Galileo (1564-1642) that the relationship between pitch and frequency was discovered. This started the science of acoustics, a term coined by Joseph Sauveur (1653-1716) who showed that strings can vibrate simultaneously at a fundamental frequency and at integral multiples that he called harmonics. Isaac Newton (1642-1727) was the first to calculate the speed of sound in his Principia. However, he assumed isothermal conditions so his value was too low compared with measured values. This discrepancy was resolved by Laplace (1749-1827) when he included adiabatic heating and cooling effects. The first analytical solution for a vibrating string was given by Brook Taylor (1685-1731). After this, advances were made by Daniel Bernoulli (1700-82), Leonard Euler (1707-83) and Jean d'Alembert (1717-83) who found the first solution to the linear wave equation, see section (3.2). Whilst others had shown that a wave can be represented as a sum of simple harmonic oscillations, it was Joseph Fourier (1768-1830) who conjectured that arbitrary functions can be represented by the superposition of an infinite sum of sines and cosines - now known as the Fourier series. -
Arxiv:1912.02281V1 [Math.NA] 4 Dec 2019
A HIGH-ORDER DISCONTINUOUS GALERKIN METHOD FOR NONLINEAR SOUND WAVES PAOLA. F. ANTONIETTI1, ILARIO MAZZIERI1, MARKUS MUHR∗;2, VANJA NIKOLIC´ 3, AND BARBARA WOHLMUTH2 1MOX, Dipartimento di Matematica, Politecnico di Milano, Milano, Italy 2Department of Mathematics, Technical University of Munich, Germany 3Department of Mathematics, Radboud University, The Netherlands Abstract. We propose a high-order discontinuous Galerkin scheme for nonlinear acoustic waves on polytopic meshes. To model sound propagation with and without losses, we use Westervelt's nonlinear wave equation with and without strong damping. Challenges in the numerical analysis lie in handling the nonlinearity in the model, which involves the derivatives in time of the acoustic velocity potential, and in preventing the equation from degenerating. We rely in our approach on the Banach fixed-point theorem combined with a stability and convergence analysis of a linear wave equation with a variable coefficient in front of the second time derivative. By doing so, we derive an a priori error estimate for Westervelt's equation in a suitable energy norm for the polynomial degree p ≥ 2. Numerical experiments carried out in two-dimensional settings illustrate the theoretical convergence results. In addition, we demonstrate efficiency of the method in a three- dimensional domain with varying medium parameters, where we use the discontinuous Galerkin approach in a hybrid way. 1. Introduction Nonlinear sound waves arise in many different applications, such as medical ultra- sound [20, 35, 44], fatigue crack detection [46, 48], or musical acoustics of brass instru- ments [10, 23, 38]. Although considerable work has been devoted to their analytical stud- ies [29, 30, 33, 37] and their computational treatment [27, 34, 42, 51], rigorous numerical analysis of nonlinear acoustic phenomena is still largely missing from the literature. -
A History of Electroacoustics: Hollywood 1956 – 1963 by Peter T
A History of Electroacoustics: Hollywood 1956 – 1963 By Peter T. Humphrey A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Music and the Designated Emphasis in New Media in the Graduate Division of the University of California, Berkeley Committee in charge: Professor James Q. Davies, Chair Professor Nicholas de Monchaux Professor Mary Ann Smart Professor Nicholas Mathew Spring 2021 Abstract A History of Electroacoustics: Hollywood 1956 – 1963 by Peter T. Humphrey Doctor of Philosophy in Music and the Designated Emphasis in New Media University of California, Berkeley Professor James Q. Davies, Chair This dissertation argues that a cinematic approach to music recording developed during the 1950s, modeling the recording process of movie producers in post-production studios. This approach to recorded sound constructed an imaginary listener consisting of a blank perceptual space, whose sonic-auditory experience could be controlled through electroacoustic devices. This history provides an audiovisual genealogy for electroacoustic sound that challenges histories of recording that have privileged Thomas Edison’s 1877 phonograph and the recording industry it generated. It is elucidated through a consideration of the use of electroacoustic technologies for music that centered in Hollywood and drew upon sound recording practices from the movie industry. This consideration is undertaken through research in three technologies that underwent significant development in the 1950s: the recording studio, the mixing board, and the synthesizer. The 1956 Capitol Records Studio in Hollywood was the first purpose-built recording studio to be modelled on sound stages from the neighboring film lots. The mixing board was the paradigmatic tool of the recording studio, a central interface from which to direct and shape sound. -
A History of Rhythm, Metronomes, and the Mechanization of Musicality
THE METRONOMIC PERFORMANCE PRACTICE: A HISTORY OF RHYTHM, METRONOMES, AND THE MECHANIZATION OF MUSICALITY by ALEXANDER EVAN BONUS A DISSERTATION Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Department of Music CASE WESTERN RESERVE UNIVERSITY May, 2010 CASE WESTERN RESERVE UNIVERSITY SCHOOL OF GRADUATE STUDIES We hereby approve the thesis/dissertation of _____________________________________________________Alexander Evan Bonus candidate for the ______________________Doctor of Philosophy degree *. Dr. Mary Davis (signed)_______________________________________________ (chair of the committee) Dr. Daniel Goldmark ________________________________________________ Dr. Peter Bennett ________________________________________________ Dr. Martha Woodmansee ________________________________________________ ________________________________________________ ________________________________________________ (date) _______________________2/25/2010 *We also certify that written approval has been obtained for any proprietary material contained therein. Copyright © 2010 by Alexander Evan Bonus All rights reserved CONTENTS LIST OF FIGURES . ii LIST OF TABLES . v Preface . vi ABSTRACT . xviii Chapter I. THE HUMANITY OF MUSICAL TIME, THE INSUFFICIENCIES OF RHYTHMICAL NOTATION, AND THE FAILURE OF CLOCKWORK METRONOMES, CIRCA 1600-1900 . 1 II. MAELZEL’S MACHINES: A RECEPTION HISTORY OF MAELZEL, HIS MECHANICAL CULTURE, AND THE METRONOME . .112 III. THE SCIENTIFIC METRONOME . 180 IV. METRONOMIC RHYTHM, THE CHRONOGRAPHIC -
Access to Communications Technology
A Access to Communications Technology ABSTRACT digital divide: the Pew Research Center reported in 2019 that 42 percent of African American adults and Early proponents of digital communications tech- 43 percent of Hispanic adults did not have a desk- nology believed that it would be a powerful tool for top or laptop computer at home, compared to only disseminating knowledge and advancing civilization. 18 percent of Caucasian adults. Individuals without While there is little dispute that the Internet has home computers must instead use smartphones or changed society radically in a relatively short period public facilities such as libraries (which restrict how of time, there are many still unable to take advantage long a patron can remain online), which severely lim- of the benefits it confers because of a lack of access. its their ability to fill out job applications and com- Whether the lack is due to economic, geographic, or plete homework effectively. demographic factors, this “digital divide” has serious There is also a marked divide between digital societal repercussions, particularly as most aspects access in highly developed nations and that which of life in the twenty-first century, including banking, is available in other parts of the world. Globally, the health care, and education, are increasingly con- International Telecommunication Union (ITU), a ducted online. specialized agency within the United Nations that deals with information and communication tech- DIGITAL DIVIDE nologies (ICTs), estimates that as many as 3 billion people living in developing countries may still be In its simplest terms, the digital divide refers to the gap unconnected by 2023. -
Deep Learning in Ultrasound Imaging Deep Learning Is Taking an Ever More Prominent Role in Medical Imaging
1 Deep learning in Ultrasound Imaging Deep learning is taking an ever more prominent role in medical imaging. This paper discusses applications of this powerful approach in ultrasound imaging systems along with domain-specific opportunities and challenges. RUUD J.G. VAN SLOUN1,REGEV COHEN2 AND YONINA C. ELDAR3 ABSTRACT j We consider deep learning strategies in ultra- a highly cost-effective modality that offers the clinician an sound systems, from the front-end to advanced applications. unmatched and invaluable level of interaction, enabled by its Our goal is to provide the reader with a broad understand- real-time nature. Its portability and cost-effectiveness permits ing of the possible impact of deep learning methodologies point-of-care imaging at the bedside, in emergency settings, on many aspects of ultrasound imaging. In particular, we rural clinics, and developing countries. Ultrasonography is discuss methods that lie at the interface of signal acquisi- increasingly used across many medical specialties, spanning tion and machine learning, exploiting both data structure from obstetrics to cardiology and oncology, and its market (e.g. sparsity in some domain) and data dimensionality (big share is globally growing. data) already at the raw radio-frequency channel stage. On the technological side, ultrasound probes are becoming As some examples, we outline efficient and effective deep increasingly compact and portable, with the market demand learning solutions for adaptive beamforming and adaptive for low-cost ‘pocket-sized’ devices expanding [2], [3]. Trans- spectral Doppler through artificial agents, learn compressive ducers are miniaturized, allowing e.g. in-body imaging for encodings for color Doppler, and provide a framework for interventional applications. -
Sine Waves and Simple Acoustic Phenomena in Experimental Music - with Special Reference to the Work of La Monte Young and Alvin Lucier
Sine Waves and Simple Acoustic Phenomena in Experimental Music - with Special Reference to the Work of La Monte Young and Alvin Lucier Peter John Blamey Doctor of Philosophy University of Western Sydney 2008 Acknowledgements I would like to thank my principal supervisor Dr Chris Fleming for his generosity, guidance, good humour and invaluable assistance in researching and writing this thesis (and also for his willingness to participate in productive digressions on just about any subject). I would also like to thank the other members of my supervisory panel - Dr Caleb Kelly and Professor Julian Knowles - for all of their encouragement and advice. Statement of Authentication The work presented in this thesis is, to the best of my knowledge and belief, original except as acknowledged in the text. I hereby declare that I have not submitted this material, either in full or in part, for a degree at this or any other institution. .......................................................... (Signature) Table of Contents Abstract..................................................................................................................iii Introduction: Simple sounds, simple shapes, complex notions.............................1 Signs of sines....................................................................................................................4 Acoustics, aesthetics, and transduction........................................................................6 The acoustic and the auditory......................................................................................10 -
Lab 5A: Mersenne's Laws & Melde's Experiment
CSUEB Physics 1780 Lab 5a: Mersenne & Melde Page 1 Lab 5a: Mersenne’s Laws & Melde's experiment Introduction Vincenzo Galilei (1520 –1591), the father of Galileo Galilei, was an Italian lutenist, composer, and music theorist. It is reported that he showed that the pitch of a vibrating string was proportional to the square root of its tension. In other words, in order to increase the pitch by an octave (factor of 2 in frequency) it would require the tension to be quadrupled. Marin Mersenne (1588-1648, see picture), often called the “father of acoustics” , around 1630 published a book summarizing the properties of sound, based on the earlier work of Vincenzo and Galileo. He established that: • Frequency is inversely proportional to length of string • Frequency is inversely proportional to the diameter of the string • Frequency is proportional to the root of the tension • Frequency is inversely proportional to the root of the mass (density) of the string. So in summary, if you want a low note, use a fat (massive) long string under low tension. For a high pitch, use a thin short string under high tension. We can summarize all of his results with a single equation showing that the frequency “f” is proportional to: 1 F f ∝ , (1) L µ where “L” is the length of the violin string, “F” is the tension (in Newtons of force) and µ (“mu”) is the mass density of the string (in units of mass per unit length, e.g. kg per meter). In this experiment the string is assumed to be vibrating in its “fundamental” mode, like this, (figure 1). -
Transcranial Blood-Brain Barrier Opening and Power Cavitation Imaging Using a Diagnostic Imaging Array
2019 IEEE International Ultrasonics Symposium (IUS 2019) Glasgow, United Kingdom 6 – 9 October 2019 Pages 1-662 IEEE Catalog Number: CFP19ULT-POD ISBN: 978-1-7281-4597-6 1/4 Copyright © 2019 by the Institute of Electrical and Electronics Engineers, Inc. All Rights Reserved Copyright and Reprint Permissions: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limit of U.S. copyright law for private use of patrons those articles in this volume that carry a code at the bottom of the first page, provided the per-copy fee indicated in the code is paid through Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923. For other copying, reprint or republication permission, write to IEEE Copyrights Manager, IEEE Service Center, 445 Hoes Lane, Piscataway, NJ 08854. All rights reserved. *** This is a print representation of what appears in the IEEE Digital Library. Some format issues inherent in the e-media version may also appear in this print version. IEEE Catalog Number: CFP19ULT-POD ISBN (Print-On-Demand): 978-1-7281-4597-6 ISBN (Online): 978-1-7281-4596-9 ISSN: 1948-5719 Additional Copies of This Publication Are Available From: Curran Associates, Inc 57 Morehouse Lane Red Hook, NY 12571 USA Phone: (845) 758-0400 Fax: (845) 758-2633 E-mail: [email protected] Web: www.proceedings.com TABLE OF CONTENTS TRANSCRANIAL BLOOD-BRAIN BARRIER OPENING AND POWER CAVITATION IMAGING USING A DIAGNOSTIC IMAGING ARRAY ...................................................................................................................2 Robin Ji ; Mark Burgess ; Elisa Konofagou MICROBUBBLE VOLUME: A DEFINITIVE DOSE PARAMETER IN BLOOD-BRAIN BARRIER OPENING BY FOCUSED ULTRASOUND .......................................................................................................................5 Kang-Ho Song ; Alexander C. -
Ernst Florens Friedrich Chladni (30
Ullmann . Ernst Flarens Friedrich Chladni 1 Ernst Florens Friedrich Chladni (30. 11 . 1756-3.4.1827) Biographien hervorragender Naturwissenschaftler, Techniker und Mediziner Band 65 Ernst Florens Friedrich Chladni Dr. Dieter Ullmann, Berlin Mit 10 Abbildungen LEIPZIC BSB B. G. T eubner Verlagsgesellschaft . 1983 Herausgegeben von D. Goetz (Potsdam), E. Wächtler (Freiberg), H. Wußing (Leipzig) Verantwortlicher Herausgeber: D. Goetz Umschlagsfoto: Ernst Florens Friedrich Chladni. Nach einer Lithographie von Ludwig von Montmorillon. (Original im Besitz der Deutschen Staatsbibliothek Berlin, DDR.) Abbildung im Frontispiz: Ernst Florens Friedrich C~ladni. Titelvignette aus "Allgemeine musikalische Zeitung (Leipzig)", Band 10 (1808), nach einem Kupferstich von Friedrich Wilhelm Bollinger. (Foto: Deutsche Staatsbibliothek Berlin, DDR.) ISBN 978·3-322·00608·0 ISBN 978·3-322-93038·5 (eBook) DOI 10.1007/978·3-322·93038-5 ® BSB B. G. Tcubner Verlagsgesellschaft. Leip7ig. 1983 1. Auflage VLN '294-375/45183 . LSV 1108 Lektor: Hell. Müller Gesamtherstellung : EIbe-Druckerei Wlttenberg IV-28-1·542 BesteIl-Nr. 666 143 7 DDR 4.80 M Inhalt Vorwort 7 Kindheit, Jugend und Studienjahre 9 Arbeitsjahre in Wittenberg 14 Erste Reisejahre, die Meteoritenschrift von 1794 und das Hauptwerk "Die Akustik" 28 Die großen Reisen und das Lebemende 46 Nachwukungcn 63 Chronologie 69 Literatur 71 Personenregister 74 5 Für Stefan, Veronika und Christoph Vorwort Dieses scheint die Hauptaufgabe der Biographie zu sein, den Menschen in seinen Zeitverhältni"en darzustellen. Goethe Der Name des Wittenberger Physikers Ernst Florens Friedrich Chladni ist eng verbunden mit den von ihm entdeckten Klang figuren. Mit dieser Methode der Sichtbarmachung des Schwin gungsverhaltens elastischer Körper ist aber seine Bedeutung für die Wissenschaft keineswegs erschöpft.