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Music --- elektro-akoestiek --- muziekpedagogiek
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This book treats the topic of sound field synthesis with a focus on serving human listeners though the approach can be also exploited in other areas such as underwater acoustics or ultrasonics. The author derives a fundamental formulation based on standard integral equations and the single-layer potential approach is identified as a useful tool in order to derive a general solution. He also proposes extensions to the single-layer potential approach which allow for a derivation of solutions for non-enclosing distributions of secondary sources such as circular, planar, and linear ones. Based on above described formulation it is shown that the two established analytic approaches of Wave Field Synthesis and Near-field Compensated Higher Order Ambisonics constitute specific solutions to the general problem which are covered by the single-layer potential solution and its extensions. The consequences spatial discretization are analyzed in detail for all elementary geometries of secondary source distributions and applications such as the synthesis of the sound field of moving virtual sound sources, focused virtual sound sources, and virtual sound sources with complex radiation properties are discussed. An accompanying website provides MATLAB/Octave scripts for all simulations contained in the book.
Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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This book presents a mechatronic approach to Active Noise Control (ANC). It describes the required elements of system theory, engineering acoustics, electroacoustics and adaptive signal processing in a comprehensive, consistent and systematic manner using a unified notation. Furthermore, it includes a design methodology for ANC-systems, explains its application and describes tools to be used for ANC-system design. From the research point of view, the book presents new approaches to sound source localization in weakly damped interiors. One is based on the inverse finite element method, the other is based on a sound intensity probe with an active free field. Furthermore, a prototype of an ANC-system able to reach the physical limits of local (feed-forward) ANC is described. This is one example for applied research in ANC-system design. Other examples are given for (i) local ANC in a semi-enclosed subspace of an aircraft cargo hold and (ii) for the combination of audio entertainment with ANC.
Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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Acoustics and the Performance of Music connects scientific understandings of acoustics with practical applications to musical performance. Of central importance are the tonal characteristics of musical instruments and the singing voice including detailed representations of directional characteristics. Furthermore, room acoustical concerns related to concert halls and opera houses are considered. Based on this, suggestions are made for musical performance. Included are seating arrangements within the orchestra and adaptations of performance techniques to the performance environment. In the presentation we dispense with complicated mathematical connections and deliberately aim for conceptual explanations accessible to musicians, particularly for conductors. The graphical representations of the directional dependence of sound radiation by musical instruments and the singing voice are unique. Since the first edition was published in 1978, this book has been completely revised and rewritten to include current research. This translation corresponds to the latest (fifth) German edition (2004), which has become a standard reference work for audio engineers and scientists. Acoustics and the Performance of Music addresses issues that are of interest to acousticians, orchestra performers and conductors, audio engineers, architects. Researchers and students of musical acoustics will also find this text valuable.
Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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Vibrations --- akoestiek --- technische akoestiek --- geluidsisolatie --- elektro-akoestiek
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Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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Vibrations --- geluidsleer --- akoestiek --- geluidsisolatie --- elektro-akoestiek
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This book presents recent research works related to salt attack and corrosion in concrete structures, durability and service life in concrete, non-destructive techniques applied to reinforced concrete structures and acoustic performance of buildings. It identifies anomalies that affect the acoustic performance and the concrete structures, namely anomalies associated to salt attack and corrosion that affects the durability and service life of the buildings, in order to be eliminated in future projects. Offering a systematic review of the current state of knowledge, the book serves as a valuable resource for scientists, students, practitioners, and lecturers in various scientific and engineering disciplines, including civil and materials engineering, as well as and other interested parties. .
Vibrations --- akoestiek --- technische akoestiek --- geluidsisolatie --- elektro-akoestiek
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