Recent Developments In Acoustics

This book presents the proceedings of the 46th National Symposium on Acoustics (NSA 2017). The main goal of this symposium is to discuss key opportunities and challenges in acoustics, especially as applied to engineering problems. The book covers topics ranging from hydro-acoustics, environmental acoustics, bio-acoustics to musical acoustics, electro-acoustics and sound perception. The contents of this volume will prove useful to researchers and practicing engineers working on acoustics problems.

Victoria Newhouse, noted author and architectural historian, addresses the aesthetics and acoustics in concert halls and opera houses of the past, present, and future in this stunning companion to the highly regarded Towards a New Museum. Site and Sound explores the daunting, perennial question: Does the music serve the space, or the other way around? Heavily illustrated throughout—with historic images, spectular color photographs, detailed drawings—this volume is an informed and enjoyable presentation of a building type that is at the heart of cities small and large. Newhouse starts with a survey of venues from ancient Greek and Roman times and progresses to contemporary works around the world. She singles out Lincoln Center in particular for its long history and its transitions and remodelings over the years. Two major chapters cover the present: one focuses on recent work in the West, including the National Opera House of Norway in Oslo by Snøhetta (2008), the Casa da Música in Porto, Portugal, by Rem Koolhaas (2005), and many more; the second examines the boom in concert halls in China. A final chapter looks at projects that are currently planned and the future of an architecture for music.

Additional Contributing Authors Include P. Denes, T. S. Littler, E. G. Richardson, B. L. Clarkson And Heinrich Kuttruff.

Vibration and structural acoustics analysis has become an essential requirement for high-quality structural and mechanical design in order to assure acoustic comfort and the integrity, reliability and fail-safe behavior of structures and machines. The underlying technologies of this field of multidisciplinary research are evolving very fast and their dissemination is usually scattered over different and complementary scientific and technical publication means. In order to make it easy for developers and technology end-users to follow the latest developments and news in the field, this book collects into a single volume selected, extended, updated and revised versions of papers presented at the Symposium on Vibration and Structural Acoustics Analysis, coordinated by J. Dias Rodrigues and C. M. A. Vasques, which was organised as part of the 3rd International Conference on Integrity, Reliability & Failure (IRF’2009), co-chaired by J. F. Silva Gomes and Shaker A. Meguid, held at the Faculty of Engineering of the University of Porto, Portugal, 20-24 July 2009. These papers where chosen from the more than 60 papers presented at the conference symposium. Written by experienced practitioners and researchers in the field, this book brings together recent developments in the field, spanning across a broad range of themes: vibration analysis, analytical and computational structural acoustics and vibration, material systems and technologies for noise and vibration control, vibration-based structural health monitoring/evaluation, machinery noise/vibration and diagnostics, experimental testing in vibration and structural acoustics, applications and case studies in structural acoustics and vibration. Each chapter presents and describes the state of the art, presents current research results and discusses the need for future developments in a particular aspect of vibration and structural acoustics analysis. The book is envisaged to be an appealing text for newcomers to the subject and a useful research study tool for advanced students and faculty members. Practitioners and researchers may also find this book a one-stop reference that addresses current and future challenges in this field. The variety of case studies is expected to stimulate a holistic view of sound and vibration and related fields and to appeal to a broad spectrum of engineers such as the ones in the mechanical, aeronautical, aerospace, civil and electrical communities.

A history of acoustics from the 19th century to the present, written by one of the pre-eminent members of the acoustical community. The book is both a review of the major scientific advances in acoustics as well as an account of famous acousticians and their discoveries, taking in the development of the Acoustical Society of America. Acoustics is distinguished by its interdisciplinary nature and the book duly explores the fields development in its relationship to other sciences. In addition to covering the history of acoustics, the book concludes with the future of acoustics. Beautifully illustrated.

The topic of surface waves lies at the interface between a number of disci plines - physics, theoretical and applied mechanics, electroacoustics, ap plied mathematics, surface science and seismology. This volume, based on papers delivered at European Mechanics Colloquium 226, reflects this diversity in approach and background, while showing strong links between phenomena arising from different fields. The emphasis is on recent de velopments such as nonlinear and other nonclassical effects,which have great importance for both pure science and for applications such as signal processing, nondestructive evaluation and seismic studies. In recent years there has been considerable progress in the mathe matical treatment of nonlinear effects, of viscoelastic and of more novel constitutive effects which modify the predictions of linear elastic and piezo electric theory for surface acoustic wave (SAW) propagation. A number of these themes serve to group the contents of this volume. Part I contains recent advances in the rigorous mathematical treatment of nonlinearity, together with a paper giving experimental results showing the need for further theoretical development. Part II deals with anisotropic elasticity, showing that even the linear theory presents many possible behaviours, which are still not fully categorized.