Theoretical and Computional Acoustics 2001

Theoretical and Computational Acoustics 2001
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Specialised hardware still offers powerful synth engines and interesting tactile surfaces. Apps for smartphones and tablets provide fully capable engines for a few pounds.

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This book contains 67 papers presented at ICTCA It includes three keynote addresses surveying the frontier developments in computational and. This conference provided a forum for active researchers to discuss the state of the art in theoretical and computational acoustics. Topics covered structural.

Countless bottom-up projects keep launching new instruments and interfaces. The burgeoning Eurorack modular scene is bringing fresh, weird and wonderful synthesis ideas to life. But what what makes a good instrument, particularly a synthesis based one? Is it accessibility or power? Flexibility or immediacy?

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Are these aspects necessarily at odds? What matters most to the musicians that spend their lives mastering these tools?

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And are there gaps that still need to be filled? The propositions of this seminar will focus on the key mediating ingredients of any synthesis based tool: interface and parameter mapping. It will aim to provide some perspective on the balance between usability and depth of operation from the point of view of the end user. Sassoon has published several solo records as Memory9, and regularly collaborates with high profile recording acts in the UK and the US.

His work has been heard on games, TV shows, adverts and trailers worldwide. In this presentation, I will present a few scientific and technological tools that we develop to model physical systems and to process sound signals.

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The introduction will be devoted to a short description of some activities of the Project-Team S3 in physical modelling, nonlinear systems, robotics, sound synthesis and sound analysis. Then, selected works will be deepened.

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His research topics include audio processing, physics of musical instruments, physical modeling, nonlinear dynamical systems, and inversion processes. Data sources have included Internet traffic, greenhouse gas levels, ripening tomatoes, DNA sequences from synthesized biological parts, sea level rise, fracking signals and brain waves.

The outcomes span concert music, gallery sound art and applications for practical monitoring devices. I will present examples of both real-time and non-realtime approaches and some of the first considerations in attempting to translate extra-musical data into music and sound. Results using them for sonification of economic data and use of the models in other studies will be presented.

Theoretical And Computational Acoustics 2001 Li Qihu Shang E C Gao T F

Sound synthesis of gongs using a modal scheme — development and examples. Seminar Abstract. Sound synthesis of gongs can be obtained, in a first approximation, by solving the dynamical equations of a flat plate. In fact, despite a trivial geometry, a plate vibrating in a nonlinear regime shares the same salient characteristics as a gong or a cymbal.

GAIN Course on Computational Acoustics - Lecture 02

Particularly, the degree of nonlinearity can be given in terms of the amplitude of vibrations. In this talk, the nonlinear plate equations will be described and a solution in terms of the linear modes given. Examples will range from typical linear feautures bell-like sounds and plate reverb to the most dramatic nonlinear effects gongs struck at high amplitudes.

The talk will feature video contributions as well as a web-app for wave visualisation development by Theo Armour.

Introduction to Acoustics

His current research focuses on the development of the dynamics of a permanently magnetised elastic beam for energy harvesting. In addition, he is continuing to improve a sound-synthesis algorithm for gongs developed during his PhD, based on modal decomposition. It is concerned with physical modelling sound synthesis and effects processing: the emulation through simulation of acoustic entities, ranging from standard acoustic musical instruments to 3D acoustic spaces to analog electronic components and hybrid electromechanical systems, and finally virtual constructions without a real world counterpart.

In spirit, such an approach is analogous to similar developments in computer graphics, but in more technical regards, however, it presents distinct challenges. One centres around adapting numerical designs to the constraints of human audio perception, in order to avoid audible artefacts; another major challenge, due to relatively high audio sample rates, is that of computational cost, particularly for systems in 3D, and in this regard, fast implementations on GPU are under development.

Sound examples and video demonstrations will be presented. Presentation Slides. Speaker Bio Dr. Speaker Bio Ph.

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Speaker Bio Colin Gough is an Emeritus Professor of Physics at the University of Birmingham UK , where he researched the quantum wave-mechanical, ultrasonic and microwave properties of both normal and high temperature superconductors. Seminar Speaker s Dr. Tezaur and R.

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Vetterling, and B. Gilbert , J. Select an efficient optimization algorithm to search for the set of environmental parameters which produces the lowest objective function value. Orr, A. Shang, Underwater Acoustics, p. Is it accessibility or power? She received a PhD from Stanford University in

Bekkey, A finite element solution of guided modes of optical fibers using a local non-reflecting boundary condition, in: Mathematical and Numerical Aspects of Wave Propagation A. Bermudez et al. Djellouli, C. Farhat, A. Macedo and R. Tezaur, Finite element solution of two-dimensional acoustic scattering problems using arbitrarily shaped convex artificial boundaries, in: Mathematical and Numerical Aspects of Wave Propagation A.

Macedo, R. Farhat, and R.

Elastic wave simulation in heterogeneous viscoelastic media with a curved traction-free surface

Pimenta, et al. Farhat, Sensitivity analysis of direct acoustic scattering problems with respect to shape, frequency and incident direction, in: Mathematical and Numerical Aspects of Wave Propagation De Santos et al. Brown, R. Farhat, and F. Hemez, Evaluating the effect of limited instrumentation on the updating of finite element models, AIAA- , pp. Bekkey and R. Djellouli, An integral method to compute guided modes of optical couplers, in: Proceedings of IMA International Conference: Approximations and numerical methods for the solution of Maxwell's equations Dabaghi et al.

Boutekedjiret, M. Haboussi, and R. Djellouli, An Euler 3D-asymptotic model describing a dispersed two-phases flow in a duct, Computational Fluid Dynamics 94, , pp.